Alex X. Liu Professor, IEEE Fellow Department of Computer Science and Engineering 428 S. Shaw Lane Room# 3115, Engineering Building Michigan State University East Lansing, MI 48824-1266

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Alex X. Liu (Google Scholar, DBLP) received his Ph.D. degree in Computer Science from The University of Texas at Austin in 2006. He received the IEEE & IFIP William C. Carter Award in 2004, the National Science Foundation CAREER Award in 2009, the Michigan State University Withrow Distinguished Scholar (Junior) Award in 2011, the Michigan State University Withrow Distinguished Scholar (Senior) Award in 2019. He has served as an Editor for IEEE/ACM Transactions on Networking from 2012 to 2017,, and he is currently an Associate Editor for IEEE Transactions on Dependable and Secure Computing and IEEE Transactions on Mobile Computing, and an Area Editor for Computer Communications. He has served as the TPC Co-Chair for ICNP 2014 and IFIP Networking 2019. He received Best Paper Awards from ICNP-2012, SRDS-2012, and LISA-2010. His research interests focus on networking and security. He is a Fellow of the IEEE .

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My Ph.D. student, Muhammad Shahzad, has joined the Department of Computer Science at North Carolina State University as a tenure-track Assistant Professor in Fall 2015 right after he graduated from MSU. He has received 12 tenure track Assistant Professor offers from reputed universities in U.S. The College of Engineering of NCSU ranks 28th in U.S. News. He has received three NSF award. Many congratulations to Muhammad!

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My Ph.D. student, Zubair Shafiq, has joined the Department of Computer Science at The University of Iowa as a tenure-track Assistant Professor in Fall 2014 right after he graduated from MSU. By 2018, he has received four NSF awards with him being the PI, one of which is NSF CAREER Award. Many congratulations to Zubair!

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Five of my Ph.D. students (Faraz Ahmed, Muhammad Shahzad, Zubair Shafiq, Fei Chen, and Chad Meiners) won the College Outstanding Graduate Student Award (Fitch Beach), Three (Ali Munir, Muhammad Shahzad, and Chad Meiners) won the Department Outstanding Graduate Student Award, and one (Faraz Ahmed) won the Department Outstanding Teaching Award.

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Of the 8 Ph.D. students that I graduated, 2 joined academia (University of Iowa and North Carolina State University), 4 joined research labs (MIT Liconln Laboratory, HP Labs, Huawei Research Labs in California, and Huawei Research Lab at Hong Kong), two started their own startup in California.

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Awards

• Withrow Distinguished Scholar (Senior) Award, Michigan State University, 2019. This award is presented annually to a faculty member in the College of Engineering who demonstrates excellence in scholarship. [Photo with Professor Leo Kempel, Dean of College of Engineering, and Professor John Verboncoeur, Associate Dean for Research of College of Engineering.] [Award Certificate] [Award Statement]
• Fellow, IEEE, 2019.
• Best Paper Award Candidate (5 out of 292), the 36th Annual IEEE International Conference on Computer Communications (INFOCOM), 2017.
• Best Paper Award Candidate (3 out of 43), the 16th IEEE-IFIP Networking Conference (Networking), 2017.
• Best Poster Award - IEEE International Conference on Network Protocols (ICNP), 2016.
• Best Paper Award, the 20th IEEE International Conference on Network Protocols (ICNP), 2012.
• Best Paper (Runner Up) Award, the 31st IEEE International Symposium on Reliable Distributed Systems (SRDS), 2012.
• Withrow Distinguished Scholar (Junior) Award, Michigan State University, 2011. This award is presented annually to a faculty member in the College of Engineering who demonstrates excellence in scholarship. [Photo with Professor Matt Mutka, Department Chair.] [Award Certificate] [Award Statement]
• Best Student Paper Award - The 24th USENIX Large Installation System Administration Conference (USENIX LISA), 2010.
• Faculty Early Career Development (CAREER) Award - National Science Foundation, 2009.
• Best Poster Award - IEEE International Conference on Network Protocols (ICNP), 2009.
• Best Paper Award - IEEE International Symposium on Trust, Security and Privacy for Pervasive Applications, 2009.
• George H. Mitchell Award for Excellence in Graduate Research - University of Texas at Austin (6 winners for the whole university per year), 2005. This award is presented annually, with the citation, "to recognize outstanding graduate students for the pursuit and achievement of excellence in research. For this award, research is interpreted broadly and applicants are judged on the basis of outstanding contributions to their field of study". [Photo with Dr. Larry R. Faulkner, the President of UT-Austin][On Daily Texan Newspaper (page 5) - April 18, 2005]
• James C. Browne Outstanding Graduate Student Fellowship - The University of Texas at Austin (2 winners in the Computer Science Department per year), 2005. This award is presented annually to recognize outstanding graduate students in computer sciences.
• William C. Carter Award - IEEE & IFIP, 2004. This award is presented annually, with the citation, "to recognize an individual who has made a significant contribution to the field of dependable computing through his or her graduate dissertation research". This award is sponsored by IEEE Computer Society Technical Committee on Fault-Tolerant Computing and IFIP Working Group 10.4 on Dependable Computing and Fault Tolerance.
• National Award for Outstanding Overseas Students - Ministry of Education of China, 2004. This award is presented annually, with the citation, "to recognize outstanding Chinese overseas self-financing students who have made excellent academic achievements". (200 winners globally of all disciplines.) [Award ceremony photos]

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Books

• RFID Protocol Design, Optimization, and Security for the Internet of Things
  Alex X. Liu, Muhammad Shahzad, Xiulong Liu, and Keqiu Li.
  The Institution of Engineering and Technology. ISBN-10: 1785613324. ISBN-13: 978-1785613326. December 2017.

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• Firewall Design and Analysis
  Alex X. Liu
  World Scientific Publishing Company. ISBN-10: 9814261653. ISBN-13: 9789814261654. December 2010.

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• Hardware Based Packet Classification for High Speed Internet Routers
  Chad R. Meiners, Alex X. Liu, and Eric Torng
  Springer. ISBN-10: 1441966994. ISBN-13: 9781441966995. June 2010.

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Selected Conference Publications

• SecEQP: A Secure and Efficient Scheme for SkNN Query Problem over Encrypted Geodata on Cloud
  Xinyu Lei, Alex X. Liu, Rui Li, Guan-Hua Tu
  In Proceedings of the 35th IEEE International Conference on Data Engineering (ICDE), Macau SAR, April 2019.
  

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• Synthesizing Wider WiFi Bandwidth for Respiration Rate Monitoring in Dynamic Environments
  Shuyu Shi, Yaxiong Xie, Alex X. Liu, Jun Zhao, and Mo Li.
  In Proceedings of the 38th Annual IEEE International Conference on Computer Communications (INFOCOM), Paris, France, April, 2019.
  Acceptance rate: 288/1464 = 19.7%.

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• PCIAS: Precise and Contactless Measurement of Instantaneous Angular Speed Using a Smartphone
  Zeshui Li, Haipeng Dai, Wei Wang, Alex X. Liu, and Guihai Chen.
  In Proceedings of the ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), London, UK, September, 2019.
  

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• Distributed Spectrum Sharing for Enterprise Powerline Communication Networks
  Kamran Ali, Alex X. Liu, Ioannis Pefkianakis, Kyu-Han Kim.
  In Proceedings of the 26th IEEE International Conference on Network Protocols (ICNP), Cambridge, UK, September, 2018.
  

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• QGesture: Quantifying Gesture Distance and Direction with WiFi Signals
  Nan Yu, Wei Wang, Alex X. Liu, and Lingtao Kong.
  In Proceedings of the 20th ACM International Joint Conference on Pervasive and Ubiquitous Computing (UBICOMP), Singapore, October 2018.
  

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• Charging Task Scheduling for Directional Wireless Charger Networks
  Haipeng Dai, Ke Sun, Alex X. Liu, Lijun Zhang, Jiaqi Zheng and Guihai Chen.
  In Proceedings of the 47th International Conference on Parallel Processing (ICPP), pages 10:1-10:10, Eugene, Oregon, August, 2018.
  

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• Cache Assisted Randomized Sharing Counters in Network Measurement'
  Qian Liu, Haipeng Dai, Alex X. Liu, Qi Li, Xiaoyu Wang and Jiaqi Zheng.
  In Proceedings of the 47th International Conference on Parallel Processing (ICPP), pages 40:1-40:10, Eugene, Oregon, August, 2018.
  

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• Depth Aware Finger Tapping on Virtual Displays
  Ke Sun, Wei Wang, Alex X. Liu, and Haipeng Dai.
  In Proceedings of the 16th ACM International Conference on Mobile Systems, Applications, and Services (MobiSys), Munich, Germany, June, 2018.
  

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• UltraGesture: Fine-Grained Gesture Sensing and Recognition
  Kang Ling, Haipeng Dai, Yuntang Liu, and Alex X. Liu.
  In Proceedings of the IEEE International Conference on Sensing, Communication and Networking (SECON), Hong Kong, June 2018.
  

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• WiTrace: Centimeter-Level Passive Gesture Tracking Using WiFi Signals
  Lei Wang, Ke Sun, Haipeng Dai, Alex X. Liu, and Xiaoyu Wang.
  In Proceedings of the IEEE International Conference on Sensing, Communication and Networking (SECON), Hong Kong, June 2018.
  

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• The Insecurity of Home Digital Voice Assistants - Vulnerabilities, Attacks, and Countermeasures
  Xinyu Lei, Guan-Hua Tu, Alex X. Liu, Chi-Yu Li, and Tian Xie.
  In Proceedings of the 6th IEEE Conference on Communications and Network Security (CNS), Beijing, China, May 2018.
  

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• Finding Persistent Items in Distributed Datasets
  Haipeng Dai, Meng Li, and Alex X. Liu.
  In Proceedings of the 37th Annual IEEE International Conference on Computer Communications (INFOCOM), Honolulu, HI, April, 2018.
  Acceptance rate: 309/1606 = 19.2%

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• Placement of Connected Wireless Chargers
  Nan Yu, Haipeng Dai, Alex X. Liu, and Bingchuan Tian.
  In Proceedings of the 37th Annual IEEE International Conference on Computer Communications (INFOCOM), Honolulu, HI, April, 2018.
  Acceptance rate: 309/1606 = 19.2%

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• Fast OpenFlow Table Lookup with Fast Update
  Tong Yang, Alex X. Liu, Qiaobin Fu, and Xiaoming Li.
  In Proceedings of the 37th Annual IEEE International Conference on Computer Communications (INFOCOM), Honolulu, HI, April, 2018.
  Acceptance rate: 309/1606 = 19.2%

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• Multipath TCP Traffic Diversion Attacks and Countermeasures
  Ali Munir, Zhiyun Qian, Zubair Shafiq, Alex X. Liu, and Franck Le.
  In Proceedings of the 25th IEEE International Conference on Network Protocols (ICNP), Toronto, Canada, October, 2017.
  Acceptance rate: 39/209=18.7%

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• Finding Persistent Items in Data Streams
  Haipeng Dai, Muhammad Shahzad, Alex X. Liu, and Yuankun Zhong.
  In Proceedings of the 43th International Conference on Very Large Data Bases (VLDB), Munich, Germany, August, 2017.
  

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• Radiation Constrained Scheduling of Wireless Charging Tasks
  Haipeng Dai, Huizhen Ma, Alex X. Liu.
  In Proceedings of the 18th International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc), Madras, India, July, 2017.
  Acceptance rate: 30/179 = 16.7%

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• Fast and Accurate Tracking of Population Dynamics in RFID Systems
  In Proceedings of the 37th IEEE International Conference on Distributed Computing Systems (ICDCS), Atlanta, GA, June 2017.
  Acceptance rate: 90/531 = 16.9%

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• Per-flow Packet Loss Measurement without Probing (Extended Abstract)
  Muhammad Shahzad and Alex X. Liu.
  In Proceedings of the 37th IEEE International Conference on Distributed Computing Systems (ICDCS), Atlanta, GA, June 2017.

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• Pervasive Gesture Recognition Using Ambient Light (Extended Abstract)
  Muhammad Shahzad and Alex X. Liu.
  In Proceedings of the 37th IEEE International Conference on Distributed Computing Systems (ICDCS), Atlanta, GA, June 2017.

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• Cascade Size Prediction in Online Social Networks
  M. Zubair Shafiq and Alex X. Liu.
  In Proceedings of the 16th IEEE-IFIP Networking Conference (Networking), Stockholm, Sweden, June, 2017.
  Acceptance rate: 43/150 =28.7%
  Best Paper Award Candidate (3 out of 43)

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• A Graph Theoretic Approach to Fast and Accurate Malware Detection
  M. Zubair Shafiq and Alex X. Liu.
  In Proceedings of the 16th IEEE-IFIP Networking Conference (Networking), Stockholm, Sweden, June, 2017.
  Acceptance rate: 43/150 =28.7%

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• A Template Approach for Group Key Distribution in Dynamic Ad-hoc Groups
  Bruhadeshwar Bezawada, Alex X. Liu, Xiaojiang Liang, and Rui Li.
  In Proceedings of the 16th IEEE-IFIP Networking Conference (Networking), Stockholm, Sweden, June, 2017.
  Acceptance rate: 43/150 =28.7%

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• Monitoring Quality-of-Experience for Operational Cellular Networks Using Machine-to-Machine Traffic
  Faraz Ahmed, Zihui Ge, Alex X. Liu, Jia Wang, and He Yan.
  In Proceedings of the 36th Annual IEEE International Conference on Computer Communications (INFOCOM), Atlanta, Georgia, May, 2017.
  Acceptance rate: 292/1395 = 20.9%

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• Optimizing Wireless Charger Placement for Directional Charging
  Haipeng Dai, Xiaoyu Wang, Alex X. Liu, Huizhen Ma, and Guihai Chen.
  In Proceedings of the 36th Annual IEEE International Conference on Computer Communications (INFOCOM), Atlanta, Georgia, May, 2017.
  Acceptance rate: 292/1395 = 20.9%
  Best Paper Award Candidate (5 out of 292)

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• Multi-Tenant Multi-Objective Bandwidth Allocation in Datacenters Using Stacked Congestion Control
  Chen Tian, Ali Munir, Alex X. Liu, Yingtong Liu, Yanzhao Li, Jiajun Sun, Fan Zhang, ang Gong Zhang.
  In Proceedings of the 36th Annual IEEE International Conference on Computer Communications (INFOCOM), Atlanta, Georgia, May, 2017.
  Acceptance rate: 292/1395 = 20.9%

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• A Speed Hump Sensing Approach to Global Positioning in Urban Cities without GPS Signals
  Qiuxia Chen, Dongdong Ding, Xu Wang, Alex X. Liu, and Ali Munir.
  In Proceedings of the 3rd IEEE International Conference on Smart Computing (SMARTCOMP), Hong Kong, China, May, 2017.

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• Secure KNN Queries over Encrypted Data: Dimensionality is not Always a Curse (Extended Abstract)
  Xinyu Lei, Alex X. Liu, and Rui Li.
  In Proceedings of the 33th IEEE International Conference on Data Engineering (ICDE), San Diego, California, May, 2017.

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• Network Scheduling Aware Task Placement in Datacenters
  Ali Munir, Ting He, Ramya Raghavendra, Franck Le, and Alex Liu.
  In Proceedings of the 12th International Conference on emerging Networking EXperiments and Technologies (CoNEXT), pages 221-235, Irvine, California, December, 2016.
  Acceptance rate: 36/196 = 18.4%

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• A Traffic Flow Approach to Early Detection of Gathering Events
  Xun Zhou, Amin Vahedian Khezerlou, Alex Liu, M.Zubair Shafiq, and Fan Zhang.
  In Proceedings of the 24th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (SIGSPATIAL), San Francisco, California, November, 2016.
  Acceptance rate: 40/217 = 18.4%

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• A Sorted Partitioning Approach to High-speed and Fast-update OpenFlow Classification
  Sorrachai Yingchareonthawornchai, James Daly, Alex X. Liu, and Eric Torng.
  In Proceedings of the 24th IEEE International Conference on Network Protocols (ICNP), Singapore, November 2016.
  Acceptance rate: 46/229 = 20.1%

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• Optimizing Internet Transit Routing for Content Delivery Networks
  Faraz Ahmed, M. Zubair Shafiq, Amir R. Khakpour, and Alex X. Liu.
  In Proceedings of the 24th IEEE International Conference on Network Protocols (ICNP), Singapore, November 2016.
  Acceptance rate: 46/229 = 20.1%

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• Omnidirectional Chargability with Directional Antennas
  Haipeng Dai, Xiaoyu Wang, Alex Liu, Fengmin Zhang, Yang Zhao, and Guihai Chen.
  In Proceedings of the 24th IEEE International Conference on Network Protocols (ICNP), Singapore, November 2016.
  Acceptance rate: 46/229 = 20.1%

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• OpenFunction: An Extensible Data Plane Abstraction Protocol for Platform-independent Software-Defined Middleboxes (Extended Abstract)
  Chen Tian, Alex X. Liu, Ali Munir, and Jie Yang.
  In Proceedings of the 24th IEEE International Conference on Network Protocols (ICNP), Singapore, November 2016.

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• Boosting Powerline Communications for Ubiquitous Connectivity in Enterprises (Extended Abstract)
  Kamran Ali, Ioannis Pefkianakis, Alex X. Liu, and Kyu-Han Kim.
  In Proceedings of the 24th IEEE International Conference on Network Protocols (ICNP), Singapore, November 2016.

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• Macroflow: A Fine-grained Networking Abstraction for Job Completion Time Oriented Scheduling in Datacenters (Extended Abstract)
  Chen Tian, Junhua Yan, Alex X. Liu, Yizhou Tang, Yuankun Zhong, and Zi Li.
  In Proceedings of the 24th IEEE International Conference on Network Protocols (ICNP), Singapore, November 2016.

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• Fit the Elephant in a Box - Towards IP Lookup at On-chip Memory Access Speed (Extended Abstract)
  Tong Yang, Alex X. Liu, Qiaobin Fu, Dongsheng Yang, Steve Uhlig, and Xiaoming Li.
  In Proceedings of the 24th IEEE International Conference on Network Protocols (ICNP), Singapore, November 2016.

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• A Template Approach to Group Key Establishment in Dynamic Ad-hoc Groups (Extended Abstract)
  Bruhadeshwar Bezawada, Xiaojiang Liang, Alex Liu, and Rui Li.
  In Proceedings of the 24th IEEE International Conference on Network Protocols (ICNP), Singapore, November 2016.

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• Integrity Preserving Multi-keyword Searchable Encryption for Cloud Computing
  Fucai Zhou, Yuxi Li, Alex X Liu, Muqing Lin, and Zifeng Xu.
  In Proceedings of the 10th International Conference on Provable Security (ProvSec), Nanjing, China, November 2016.

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• The Rich and the Poor: A Markov Decision Process Approach to Optimizing Taxi Driver Revenue Efficiency
  Huigui Rong, Xun Zhou, Chang Yang, M.Zubair Shafiq, and Alex Liu.
  In Proceedings of the 25th ACM International Conference on Information and Knowledge Management (CIKM), Indianapolis, Indiana, October 2016.

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• Device-Free Gesture Tracking Using Acoustic Signals
  Wei Wang, Alex X. Liu, and Ke Sun
  In Proceedings of the 22th ACM Annual International Conference on Mobile Computing and Networking (MOBICOM), New York City, New York, October 2016.
  Acceptance rate: 32/226 = 14.2%

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• Gait Recognition Using WiFi Signals
  Wei Wang, Alex X. Liu, and Muhammad Shahzad
  In Proceedings of the 18th ACM International Joint Conference on Pervasive and Ubiquitous Computing (UBICOMP), HeidelBerg, Germany, September 2016.
  Acceptance rate: 115/481 = 23.9%

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• A Shifting Bloom Filter Framework for Set Queries
  Tong Yang, Alex X. Liu, Muhammad Shahzad, Yuankun Zhong, Qiaobin Fu, Zi Li, Gaogang Xie, and Xiaoming Li
  In Proceedings of the 42th International Conference on Very Large Data Bases (VLDB), Vol. 9, New Delhi, India, September, 2016.
  

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• Noisy Bloom Filters for Multi-Set Membership Testing
  Haipeng Dai, Alex X. Liu, Yuankun Zhong, Wei Wang, and Meng Li.
  In Proceedings of the ACM International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), Antibes Juan-les-Pins, France, June 2016.
  Acceptance rate: 28/208 =13.4%

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• Measurement and Analysis of Online Adult Traffic
  Faraz Ahmed, M. Zubair Shafiq, and Alex X. Liu.
  In Proceedings of the 36th IEEE International Conference on Distributed Computing Systems (ICDCS), Antibes Juan-les-Pins, France, June 2016.
  Acceptance rate: 68/386 = 17.6%

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• Social Graph Publishing with Privacy Guarantees
  Faraz Ahmed, Alex X. Liu, and Rong Jin.
  In Proceedings of the 36th IEEE International Conference on Distributed Computing Systems (ICDCS), Antibes Juan-les-Pins, France, June 2016.
  Acceptance rate: 68/386 = 17.6%

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• A De-compositional Approach to Regular Expression Matching for Network Security Applications
  Eric Norige and Alex X. Liu.
  In Proceedings of the 36th IEEE International Conference on Distributed Computing Systems (ICDCS), Antibes Juan-les-Pins, France, June 2016.
  Acceptance rate: 68/386 = 17.6%

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• Automated Reachability Troubleshooting for Large Enterprise Networks (Extended Abstract)
  Amir R. Khakpour, Alex X. Liu, and Bruhadeshwar Bezawada.
  In Proceedings of the 36th IEEE International Conference on Distributed Computing Systems (ICDCS), Antibes Juan-les-Pins, France, June 2016.
  Acceptance rate: 68/386 = 17.6%

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• A Stochastic Frame Based Approach to RFID Tag Searching
  Ann L. Wang, Muhammad Shahzad, Alex X. Liu.
  In Proceedings of the IEEE-IFIP Networking Conference (Networking), Vienna, Austria, May, 2016.
  Acceptance rate: 53/200 =26.5%

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• Characterizing Caching Workload of a Large Commercial Content Delivery Network
  M. Zubair Shafiq, Amir Khakpour, and Alex X. Liu
  In Proceedings of the 35th Annual IEEE International Conference on Computer Communications (INFOCOM), San Francisco, California, April, 2016.
  Acceptance rate: 300/1644 = 18.3%

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• Detecting and Localizing End-to-End Performance Degradation for Cellular Data Services
  Faraz Ahmed, Jeffrey Erman, Zihui Ge, Alex X. Liu, Jia Wang, and He Yan
  In Proceedings of the 35th Annual IEEE International Conference on Computer Communications (INFOCOM), San Francisco, California, April, 2016.
  Acceptance rate: 300/1644 = 18.3%

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• Radiation Constrained Wireless Charger Placement
  Haipeng Dai, Yunhuai Liu, Alex X. Liu, Lingtao Kong, Guihai Chen, and Tian He
  In Proceedings of the 35th Annual IEEE International Conference on Computer Communications (INFOCOM), San Francisco, California, April, 2016.
  Acceptance rate: 300/1644 = 18.3%

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• TOP-k Queries for Multi-category RFID Systems
  Xiulong Liu, Keqiu Li, Jie Wu, Alex X. Liu, Xin Xie, Chunsheng Zhu, and Weilian Xue
  In Proceedings of the 35th Annual IEEE International Conference on Computer Communications (INFOCOM), San Francisco, California, April, 2016.
  Acceptance rate: 300/1644 = 18.3%

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• Fairness Matters: Identification of Active RFID Tags with Statistically Guaranteed Fairness [PDF]
  Muhammad Shahzad and Alex X. Liu
  In Proceedings of the 23rd IEEE International Conference on Network Protocols (ICNP), San Francisco, California, November, 2015.
  Acceptance rate: 38/187 = 20.3%

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• Keystroke Recognition Using WiFi Signals [PDF]
  Kamran Ali, Alex X. Liu, Wei Wang, and Muhammad Shahzad
  In Proceedings of the 21th ACM Annual International Conference on Mobile Computing and Networking (MOBICOM), Paris, France, September 2015.
  Acceptance rate: 38/207 = 18.4%

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• Understanding and Modeling of WiFi Signal Based Human Activity Recognition [PDF]
  Wei Wang, Alex X. Liu, Muhammad Shahzad, Kang Ling, and Sanglu Lu
  In Proceedings of the 21th ACM Annual International Conference on Mobile Computing and Networking (MOBICOM), Paris, France, September 2015.
  Acceptance rate: 38/207 = 18.4%

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• Privacy Preserving String Matching for Cloud Computing [PDF]
  Bezawada Bruhadeshwar, Alex X. Liu, Bargav Jayaraman, Ann L. Wang, and Rui Li.
  In Proceedings of the 35th IEEE International Conference on Distributed Computing Systems (ICDCS), Columbus, Ohio, June 2015.
  Acceptance rate: 70/543 = 12.9%

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• Trigger Graphs for Fast and Accurate NoC Endpoint Simulation
  Eric Norige, Sailesh Kumar, and Alex X. Liu.
  In Proceedings of the 52nd ACM Design Automation Conference (DAC), San Francisco, California, June 2015.

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• Detecting and Localizing End-to-End Performance Degradation for Cellular Data Services (Extended Abstract) [PDF]
  Faraz Ahmed, Jeffrey Erman, Zihui Ge, Alex X. Liu, Jia Wang, and He Yan.
  In Proceedings of the the ACM International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), Portland, Oregon, June 2015.
  Acceptance rate: (32 full papers + 25 short papers)/239 =23.8%

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• Relative Localization of RFID Tags using Spatial-Temporal Phase Profiling [PDF]
  Longfei Shangguan, Zheng Yang, Alex X. Liu, Zimu Zhou, and Yunhao Liu.
  In Proceedings of the 12nd USENIX Symposium on Networked Systems Design and Implementation (NSDI), Oakland, California, May, 2015.
  Acceptance rate: 42/213 =19.7%

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• Expecting the Unexpected: Fast and Reliable Detection of Missing RFID Tags in the Wild [PDF]
  Shahzad Muhammad and Alex X. Liu.
  In Proceedings of the 34rd Annual IEEE International Conference on Computer Communications (INFOCOM), Hong Kong, China, April, 2015.
  Acceptance rate: 316/1640 =19.3%

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• Human Object Estimation via Backscattered Radio Frequency Signal [PDF]
  Han Ding, Jinsong Han, Alex X. Liu, Jizhong Zhao, Panlong Yang, Wei Xi, and Zhiping Jiang.
  In Proceedings of the 34rd Annual IEEE International Conference on Computer Communications (INFOCOM), Hong Kong, China, April, 2015.
  Acceptance rate: 316/1640 =19.3%

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• RFID Cardinality Estimation with Blocker Tags [PDF]
  Xiulong Liu, Bin Xiao, Keqiu Li, Jie Wu, Alex X. Liu, Heng Qi, and Xin Xie.
  In Proceedings of the 34rd Annual IEEE International Conference on Computer Communications (INFOCOM), Hong Kong, China, April, 2015.
  Acceptance rate: 316/1640 =19.3%

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• Fast Range Query Processing with Strong Privacy Protection for Cloud Computing[PDF]
  Rui Li, Alex X. Liu, Ann L. Wang, and Bezawada Bruhadeshwar.
  In Proceedings of the 40th International Conference on Very Large Data Bases (VLDB), Vol. 7, No. 14, Hangzhou, China, September, 2014.
  

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• Friends, not Foes - Synthesizing Existing Transport Strategies for Data Center Networks [PDF]
  Ali Munir, Ghufran Baig, Syed Muhammad Irteza, Ihsan Ayyub Qazi, Alex X. Liu, Fahad Dogar.
  In Proceedings of the ACM SIGCOMM Conference (SIGCOMM), Chicago, Illinois, August, 2014.
  Acceptance rate: 45/246 =18.3%

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• Guarantee IP Lookup Performance with FIB Explosion[PDF]
  Tong Yang, Gaogang xie, Yanbiao Li, Qiaobin Fu, Alex X. Liu, Qi Li, Laurent Mathy.
  In Proceedings of the ACM SIGCOMM Conference (SIGCOMM), Chicago, Illinois, August, 2014.
  Acceptance rate: 45/246 =18.3%

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• Noise Can Help: Accurate and Efficient Per-flow Latency Measurement without Packet Probing and Time Stamping[PDF]
  Muhammad Shahzad and Alex X. Liu.
  In Proceedings of the ACM International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), Austin, Texas, June 2014.
  Acceptance rate: 40/238 =16.8%

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• Understanding the Impact of Network Dynamics on Mobile Video User Engagement [PDF]
  M. Zubair Shafiq, Jeffrey Erman, Lusheng Ji, Alex X. Liu, Jeffrey Pang, and Jia Wang.
  In Proceedings of the ACM International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), Austin, Texas, June 2014.
  Acceptance rate: 40/238 =16.8%

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• Revisiting Caching in Content Delivery Networks: Measurement, Design, and Evaluation (Extended Abstract) [PDF]
  M. Zubair Shafiq, Alex X. Liu, and Amir Khakpour.
  In Proceedings of the ACM International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), Austin, Texas, June 2014.
  Acceptance rate: (40 full papers + 32 short papers)/238 =30.3%

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• NetSpeed Gravity: Turbocharging NoC Design, Optimization and Performance Simulation with One Integrated Specification
  Eric Norige, Sailesh Kumar, and Alex X. Liu.
  In Proceedings of the 51st ACM Design Automation Conference (DAC), San Francisco, CA, June 2014.

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• Privacy and Integrity Preserving Multi-dimensional Range Queries for Cloud Computing [PDF]
  Fei Chen and Alex X. Liu.
  In Proceedings of the IEEE-IFIP Networking Conference (Networking), Trondheim, Norway, June 2014.
  Acceptance rate: 56/221 =25.3%

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• Predicting New Collaborations in Academic Citation Networks of IEEE and ACM Conferences [PDF]
  Irfan Bukhari, Muhammad Ilyas, Mamoon Raja, Saad Saleh, Muhammad Khan, Ali Qamar, Muhammad Shafiq, Alex Liu, and Hayder Radha
  In Proceedings of the Sixth ASE International Conference on Social Computing (SocialCom-Stanford), Standford, California, May 2014.
  Acceptance rate: 24/201 =11.9%

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• An Overlay Automata Approach to Regular Expression Matching [PDF]
  Alex X. Liu and Eric Torng.
  In Proceedings of the 33rd Annual IEEE International Conference on Computer Communications (INFOCOM), Toronto, Canada, April, 2014.
  Acceptance rate: 320/1645 =19.4%

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• Packet Classification Using Binary Content Addressable Memory [PDF]
  Alex X. Liu, Chad Meiners, and Eric Torng.
  In Proceedings of the 33rd Annual IEEE International Conference on Computer Communications (INFOCOM), Toronto, Canada, April, 2014.
  Acceptance rate: 320/1645 =19.4%

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• Cross-Path Inference Attacks on Multipath TCP [PDF]
  Zubair Shafiq, Franck Le, Mudhakar Srivatsa, and Alex X. Liu.
  In Proceedings of the 12th ACM Workshop on Hot Topics in Networks (HotNets), pages 1-7, College Park, MD, November, 2013.
  Acceptance rate: 26/110 = 23.6%

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• A Few Bits are Enough - ASIC Friendly Regular Expression Matching for High Speed Network Security Systems [PDF]
  Alex X. Liu, Eric Norige, and Sailesh Kumar.
  In Proceedings of the 21st IEEE International Conference on Network Protocols (ICNP), Gottingen, Germany, October, 2013.
  Acceptance rate: 46/251 = 18.3%

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• Who are You Talking to? Breaching Privacy in Encrypted IM Networks [PDF]
  Muhammad U. Ilyas, M. Zubair Shafiq, Alex X. Liu, Hayder Radha.
  In Proceedings of the 21st IEEE International Conference on Network Protocols (ICNP), Gottingen, Germany, October, 2013.
  Acceptance rate: 46/251 = 18.3%

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• A Ternary Unification Framework for Optimizing TCAM-Based Packet Classification Systems [PDF]
  Eric Norige, Alex X. Liu, and Eric Torng.
  In Proceedings of the 9th ACM/IEEE Symposium on Architectures for Networking and Communications Systems (ANCS), pages 95-104, San Jose, California, October, 2013.

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• Scalable TCAM-based Regular Expression Matching with Compressed Finite Automata [PDF]
  Kun Huang, Linxuan Ding, Gaogang Xie, Dafang Zhang, Alex X. Liu, and Kave Salamatian.
  In Proceedings of the 9th ACM/IEEE Symposium on Architectures for Networking and Communications Systems (ANCS), pages 83-93, San Jose, California, October, 2013.

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• GAMT: A Fast and Scalable IP Lookup Engine for GPU-based Software Routers [PDF]
  Yanbiao Li, Dafang Zhang, Alex.Liu, Jintao Zheng.
  In Proceedings of the 9th ACM/IEEE Symposium on Architectures for Networking and Communications Systems (ANCS), pages 1-12, San Jose, California, October, 2013.

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• Time- and Energy-efficient Detection of Unknown Tags in Large-scale RFID Systems [PDF]
  Xiulong Liu, Heng Qi, Keqiu Li, Yanming Shen, Alex X. Liu, and Wenyu Qu.
  In Proceedings of the 10th IEEE International Conference on Mobile Ad-hoc and Sensor Systems (MASS), pages 95-103, Hangzhou, China, October, 2013.
  Acceptance rate: 55/186 = 29.6%

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• Freeweb: P2P-Assisted Collaborative Censorship-Resistant Web Browsing [PDF]
  Haiying Shen, Alex X. Liu, Lianyu Zhao
  In Proceedings of the 42nd IEEE International Conference on Parallel Processing (ICPP), pages 130-139, Lyon, France, October, 2013.
  Acceptance rate: 59/193 = 30.6%

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• Secure Unlocking of Mobile Touch Screen Devices by Simple Gestures -- You can see it but you can not do it [PDF]
  Muhammad Shahzad, Alex X. Liu, and Arjmand Samuel
  In Proceedings of the 19th ACM Annual International Conference on Mobile Computing and Networking (MOBICOM), pages 39-50, Miami, Florida, September 2013.
  Acceptance rate: 28/208 = 13.4%

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• Probabilistic Optimal Tree Hopping for RFID Identification[PDF]
  Muhammad Shahzad and Alex X. Liu.
  In Proceedings of the ACM International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), pages 293-304, Pittsburgh, PA, June 2013.
  Acceptance rate: 27/196 =13.8%
  Average review score ranks 3rd among all submissions.

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• A First Look at Cellular Network Performance during Crowded Events [PDF]
  M. Zubair Shafiq, Lusheng Ji, Alex X. Liu, Jeffrey Pang, Shobha Venkataraman, and Jia Wang.
  In Proceedings of the ACM International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), pages 17-28, Pittsburgh, Pennsylvania, June 2013.
  Acceptance rate: 27/196 =13.8%

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• A Difference Resolution Approach to Compressing Access Control Lists [PDF]
  James Daly, Alex X. Liu, and Eric Torng.
  In Proceedings of the 32th Annual IEEE Conference on Computer Communications (INFOCOM), pages 2040-2048, Turin, Italy, April 2013.
  Acceptance rate: 280/1613 =17.4%

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• A Digital Watermarking Approach to Secure and Precise Range Query Processing in Sensor Networks
  Yeqing Yi, Rui Li, Fei Chen, Alex X. Liu, Yaping Lin
  In Proceedings of the 32th Annual IEEE Conference on Computer Communications (INFOCOM), pages 1950-1958, Turin, Italy, April 2013.
  Acceptance rate: 280/1613 =17.4%

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• A Multi-Partitioning Approach to Building Fast and Accurate Counting Bloom Filters [PDF]
  Kun Huang, Jie Zhang, Dafang Zhang, Gaogang Xie, Kave Salamatian, Alex X. Liu, Wei Li
  In Proceedings of the 27th IEEE International Parallel and Distributed Processing Symposium (IPDPS), pages 1159-1170, Boston, Massachusetts, April 2013.
  Acceptance rate: 106/494 =21.4%

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• A Semantics Aware Approach to Automated Reverse Engineering Unknown Protocols [PDF]
  Yipeng Wang, Xiaochun Yun, M. Zubair Shafiq, Liyan Wang, Alex X. Liu, Zhibin Zhang, Danfeng(Daphne) Yao, Yongzheng Zhang, and Li Guo.
  In Proceedings of the 20th IEEE International Conference on Network Protocols (ICNP), pages 1-10, Austin, Texas, October 2012.
  Acceptance rate: 30/131 = 22.9%
Best Paper Award

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• First Step Toward Cloud-Based Firewalling [PDF]
  Amir R. Khakpour and Alex X. Liu.
  In Proceedings of the 31st IEEE International Symposium on Reliable Distributed Systems (SRDS), pages 41-50, Irvine, California, October 2012.
  Acceptance rate: 28/140= 20%
Best Paper (Runner Up) Award

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• Every Bit Counts - Fast and Scalable RFID Estimation [PDF]
  Muhammad Shahzad and Alex X. Liu
  In Proceedings of the 18th ACM Annual International Conference on Mobile Computing and Networking (MOBICOM), pages 365-376, Istanbul, Turkey, August 2012.
  Acceptance rate: 32/212 = 15.1%

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• A First Look at Cellular Machine-to-Machine Traffic - Large Scale Measurement and Characterization [PDF]
  M. Zubair Shafiq, Lusheng Ji, Alex X. Liu, Jeffrey Pang, and Jia Wang
  In Proceedings of the ACM International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), pages 65-76, London, United Kingdom, June 2012.
  Acceptance rate: 31/203 =15.3%

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• A Large Scale Exploratory Analysis of Software Vulnerability Life Cycles [PDF]
  Muhammad Shahzad, M. Zubair Shafiq, and Alex X. Liu
  In Proceedings of the 34th International Conference on Software Engineering (ICSE), Zurich, Switzerland, June 2012.
  Acceptance rate: 87/408 =21.3%

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• A Prefiltering Approach to Regular Expression Matching for Network Security Systems [PDF]
  Tingwen Liu, Yong Sun, Alex X. Liu, Li Guo, and Binxing Fang
  In Proceedings of the 10th International Conference on Applied Cryptography and Network Security (ACNS), pages 363-380, Singapore, June 2012.
  Acceptance rate: 33/192=17.2%.

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• A Task-Based Model for the Lifespan of Peer-to-Peer Swarms [PDF]
  Yong Zhao, Zhibin Zhang, Ting He, Alex X. Liu, Li Guo, and Binxing Fang
  In Proceedings of the 11th IFIP International Conferences on Networking (Networking), pages 71-83, Prague, Czech Republic, May 2012.
  Acceptance rate: 64/225 = 28.4%.

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• FlowSifter: A Counting Automata Approach to Layer 7 Field Extraction for Deep Flow Inspection [PDF]
  Chad Meiners, Eric Norige, Alex X. Liu, and Eric Torng.
  In Proceedings of the 31th Annual IEEE Conference on Computer Communications (INFOCOM), pages 1746-1754, Orlando, Florida, March 2012.
  Acceptance rate: 278/1547 =17.9%

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• Characterizing Geospatial Dynamics of Application Usage in a 3G Cellular Data Network [PDF]
  M. Zubair Shafiq, Lusheng Ji, Alex X. Liu, Jeffrey Pang, and Jia Wang.
  In Proceedings of the 31th Annual IEEE Conference on Computer Communications (INFOCOM), pages 1341-1349, Orlando, Florida, March 2012.
  Acceptance rate: 278/1547 =17.9%

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• Firewall Fingerprinting [PDF]
  Amir R. Khakpour, Joshua W. Hulst, Zihui Ge, Alex X. Liu, Dan Pei, and Jia Wang.
  In Proceedings of the 31th Annual IEEE Conference on Computer Communications (INFOCOM), pages 1728-1736, Orlando, Florida, March 2012.
  Acceptance rate: 278/1547 =17.9%

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• Bypassing Space Explosion in Regular Expression Matching for Network Intrusion Detection and Prevention Systems [PDF]
  Jignesh Patel, Alex Liu, and Eric Torng
  In Proceedings of the 19th Annual Network & Distributed System Security Symposium (NDSS), San Diego, California, February 2012.
  Acceptance rate: 46/258 = 17.8%

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• Privacy-Preserving Cross-Domain Network Reachability Quantification [PDF]
  Fei Chen, Bezawada Bruhadeshwar, and Alex X. Liu
  In Proceedings of the 19th IEEE International Conference on Network Protocols (ICNP), pages 155-164, Vancouver, Canada, October 2011.
  Acceptance rate: 31/189 = 16.4%

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• SPliT: Optimizing Space, Power, and Throughput for TCAM-Based Classification [PDF]
  Chad R. Meiners, Alex X. Liu, Eric Torng, and Jignesh Patel
  In Proceedings of the 7th ACM/IEEE Symposium on Architectures for Networking and Communications Systems (ANCS), pages 200-210, Brooklyn, New York, October 2011.
  Acceptance rate: 20/62 = 32.3%

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• NcRNA Homology Search Using Hamming Distance Seeds [PDF]
  Osama Aljawad, Yanni Sun, Alex Liu, and Jikai Lei
  In Proceedings of the ACM Conference on Bioinformatics, Computational Biology and Biomedicine (BCB), pages 209-217, Chicago, Illinois, August 2011.
  Acceptance rate: 29/153 = 18.9%

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• Characterizing and Modeling Internet Traffic Dynamics of Cellular Devices [PDF]
  M. Zubair Shafiq, Lusheng Ji, Alex X. Liu, and Jia Wang
  In Proceedings of the International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), pages 305-316, San Jose, California, June 2011.
  Acceptance rate: 26/177 = 14.6%

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• A Random Walk Approach to Modeling the Dynamics of the Blogosphere [PDF]
  M. Zubair Shafiq and Alex X. Liu
  In Proceedings of the International Conferences on Networking (Networking), pages 294-306, Valencia, Spain, May 2011.
  Acceptance rate: 64/294 = 21.7%.

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• A Cross-Domain Privacy-Preserving Protocol for Cooperative Firewall Optimization [PDF]
  Fei Chen, Bezawada Bruhadeshwar, and Alex X. Liu
  In Proceedings of the 30th Annual IEEE Conference on Computer Communications (INFOCOM), pages 2903-2911, Shanghai, China, April 2011.
  Acceptance rate: 291/1283 = 15.9%.

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• A Distributed and Privacy-Preserving Algorithm for Identifying Information Hubs in Social Networks [PDF]
  Muhammad U. Ilyas, M. Zubair Shafiq, Alex X. Liu and Hayder Radha
  In Proceedings of the 30th Annual IEEE Conference on Computer Communications (INFOCOM) Mini-Conference, pages 561-565, Shanghai, China, April 2011.
  Acceptance rate: (291+136)/1283 = 23.4%.

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• Collaborative Firewalling in Wireless Networks [PDF]
  Mahmoud Taghizadeh, Amir R. Khakpour, Alex X. Liu, and Subir Biswas
  In Proceedings of the 30th Annual IEEE Conference on Computer Communications (INFOCOM) Mini-Conference, pages 46-50, Shanghai, China, April 2011.
  Acceptance rate: (291+136)/1283 = 23.4%.

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• Offset Addressing Approach to Memory-Efficient IP Address Lookup [PDF]
  Kun Huang, Gaogang Xie, Yanbiao Li, and Alex X. Liu
  In Proceedings of the 30th Annual IEEE Conference on Computer Communications (INFOCOM) Mini-Conference, pages 306-310, Shanghai, China, April 2011.
  Acceptance rate: (291+136)/1283 = 23.4%.

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• Large Scale Hamming Distance Query Processing [PDF]
  Alex X. Liu, Ke Shen, and Eric Torng
  In Proceedings of the 27th IEEE International Conference on Data Engineering, (ICDE), pages 553-564, Hannover, Germany, April, 2011.
  Acceptance rate: 98/494 = 19.8%.

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• First Step Towards Automatic Correction of Firewall Policy Faults [PDF]
  Fei Chen, Alex X. Liu, JeeHyun Hwang, and Tao Xie
  In Proceedings of the 24th USENIX Large Installation System Administration Conference (USENIX LISA), pages 75-90, San Jose, California, November 2010.
  Best Student Paper Award

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• Transforming Range Queries to Equivalent Box Queries to Optimize Page Access [PDF]
  Sakti Pramanik, Alok Watve, Chad R. Meiners, and Alex X. Liu
  In Proceedings of the 36th International Conference on Very Large Data Bases (VLDB), pages 409-416, Singapore, September 2010.
  Acceptance rate: 48/261 = 18.4%.

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• Fast Regular Expression Matching using Small TCAMs for Network Intrusion Detection and Prevention Systems [PDF]
  Chad R. Meiners, Jignesh Patel, Eric Norige, Eric Torng, and Alex X. Liu
  In Proceedings of the 19th USENIX Security Symposium (USENIX Security), pages 111-126, Washington, DC, August 2010.
  Acceptance rate: 30/202 = 14.8%.

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• Quantifying and Querying Network Reachability [PDF]
  Amir R. Khakpour and Alex X. Liu
  In Proceedings of the 29th International Conference on Distributed Computing Systems (ICDCS), pages 817-826, Genoa, Italy, June 2010.
  Acceptance rate: 84/585 = 14%.

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• SafeQ: Secure and Efficient Query Processing in Sensor Networks [PDF]
  Fei Chen and Alex X. Liu
  In Proceedings of the 29th Annual IEEE Conference on Computer Communications (INFOCOM), pages 2642-2650, San Diego, California, March 2010.
  Acceptance rate: 276/1575 =17.5%
  

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• CENDA-Camouflage Event Based Malicious Node Detection Architecture [PDF]
  Kanthakumar Pongaliur, Li Xiao, Alex X. Liu.
  In Proceedings of the IEEE International Symposium on Trust, Security and Privacy for Pervasive Applications (TSP), pages 848-855, Macau, China, October, 2009.
  Acceptance rate: 27/85 = 31.7%
  Best Paper Award
  

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• Bit Weaving: A Non-prefix Approach to Compressing Packet Classifiers in TCAMs [PDF]
  Chad R. Meiners, Alex X. Liu, and Eric Torng
  In Proceedings of the 17th IEEE International Conference on Network Protocols (ICNP), pages 93-102, Princeton, New Jersey, October 2009.
  Acceptance rate: 36/197=18.3%
  

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• Fault Localization for Firewall Policies [PDF]
  Jeehyun Hwang, Tao Xie, Fei Chen, and Alex X. Liu
  In Proceedings of the 28th IEEE International Symposium on Reliable Distributed Systems (SRDS), pages 100-106, Niagara Falls, New York, September 2009.
  Acceptance rate: 30/104 = 28.8%

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• Topological Transformation Approaches to Optimizing TCAM-Based Packet Processing Systems [PDF]
  Chad R. Meiners, Alex X. Liu, and Eric Torng
  In Proceedings of the International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), pages 73-84, Seattle, Washington, June 2009.
  Acceptance rate: 27/180 = 15%.

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• High-speed Flow Nature Identification [PDF]
  Amir R. Khakpour and Alex X. Liu
  In Proceedings of the 29th International Conference on Distributed Computing Systems (ICDCS), pages 510-517, Montreal, Quebec, Canada, June 2009.
  Acceptance rate: 74/455 = 16%.

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• Collaborative Enforcement of Firewall Policies in Virtual Private Networks [PDF][BibTex]
  Alex X. Liu and Fei Chen
  In Proceedings of the Annual ACM SIGACT-SIGOPS Symposium on Principles of Distributed Computing (PODC), pages 95-104, Toronto, Canada, August 2008.
  Average review score = (4 + 4 + 4)/3 = 4 out of 5.
  Acceptance rate: 40/132 = 30%
  

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• XEngine: A Fast and Scalable XACML Policy Evaluation Engine [PDF][BibTex]
  Alex X. Liu, Fei Chen, JeeHyun Hwang, and Tao Xie
  In Proceedings of the International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), Pages 265-276, Annapolis, Maryland, June 2008.
  Acceptance rate: 36/201 = 18%. Average review score = 8.7 out of 10. Ranked 2nd among all submissions.
  Sample quotes from diligent reviewers
  Full version is available here: [PDF]
  

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• Algorithmic Approaches to Redesigning TCAM-Based Systems (Extended Abstract) [PDF]
  Chad R. Meiners, Alex X. Liu, and Eric Torng
  In Proceedings of the International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS), Annapolis, Maryland, June 2008. (Extended Abstract)
  Acceptance rate: (36 full papers + 21 short papers)/201 =28.4%

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• All-Match Based Complete Redundancy Removal for Packet Classifiers in TCAMs [PDF][BibTex]
  Alex X. Liu, Chad R. Meiners, and Yun Zhou
  In Proceedings of the 27th Annual IEEE Conference on Computer Communications (INFOCOM), pages 574-582, Phoenix, Arizona, April 2008.
  Average review score = (4 + 4 + 4)/3 = 4.
  Acceptance rate: 236/1160 =20.3%

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• Firewall Compressor: An Algorithm for Minimizing Firewall Policies [PDF][BibTex]
  Alex X. Liu, Eric Torng, and Chad Meiners
  In Proceedings of the 27th Annual IEEE Conference on Computer Communications (INFOCOM), pages 691-699, Phoenix, Arizona, April 2008.
  Acceptance rate: 236/1160 =20.3%

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• Symmetric Key Approaches to Securing BGP -- A Little Bit Trust is Enough [PDF][BibTex]
  Bezawada Bruhadeshwar, Sandeep S. Kulkarni, and Alex X. Liu
  In Proceedings of the 12th European Symposium Research Computer Security (ESORICS), pages 82-96, Malaga, Spain, October, 2008.
  Acceptance rate: 37/168 =22%

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• Systematic Structural Testing of Firewall Policies [PDF][BibTex]
  Jeehyun Hwang, Tao Xie, Fei Chen, and Alex X. Liu
  In Proceedings of the 27th IEEE International Symposium on Reliable Distributed Systems (SRDS), Napoli, Italy, October, 2008.
  Acceptance rate: 28/112 =25%

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• TCAM Razor: A Systematic Approach Towards Minimizing Packet Classifiers in TCAMs [PDF][BibTex]
  Chad R. Meiners, Alex X. Liu, and Eric Torng
  In Proceedings of the 15th IEEE International Conference on Network Protocols (ICNP), pages 226-275, Beijing, China, October 2007.
  Acceptance rate: 32/220=14.5%
  

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• Change-Impact Analysis of Firewall Policies [PDF][BibTex]
  Alex X. Liu
  In Proceedings of the 12th European Symposium Research Computer Security (ESORICS), pages 155-170, Dresden, Germany, September 2007.
  Acceptance rate: 39/164=23.7%
  

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• A Model of Stateful Firewalls and its Properties [PDF][BibTex]
  Mohamed G. Gouda and Alex X. Liu
  In Proceedings of the IEEE International Conference on Dependable Systems and Networks (DSN), pages 128-137, Yokohama, Japan, June 2005.
  Acceptance rate: 78/319=24.5%
  

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• Single Password, Multiple Accounts [PDF][BibTex]
  Mohamed G. Gouda, Alex X. Liu, Lok M. Leung, and Mohamed A. Alam
  In Proceedings of the 3rd Applied Cryptography and Network Security Conference (ACNS), New York City, New York, June 2005. (industry track)
  Acceptance rate: 78/319=24.5%
  

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• Zmail: Zero-Sum Free Market Control of Spam [PDF][BibTex]
  Benjamin J. Kuipers, Alex X. Liu, Aashin Gautam, and Mohamed G. Gouda
  In Proceedings of the 4th International Workshop on Assurance in Distributed Systems and Networks (ADSN), Columbus, Ohio, June 2005.

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• Firewall Queriesbr> Alex X. Liu, Mohamed G. Gouda, Huibo Heidi Ma, and Anne HH. Ngu.
  In Proceedings of the 8th International Conference on Principles of Distributed Systems (OPODIS), Grenoble, France, December 2004.
  

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• Removing Redundancy from Packet Classifiers (Extended Abstract)
  Alex X. Liu and Mohamed G. Gouda.
  In Proceedings of SIGCOMM, Portland, Oregon, August, 2004.
  

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• Diverse Firewall Design [PDF][BibTex]
  Alex X. Liu and Mohamed G. Gouda
  In Proceedings of the IEEE International Conference on Dependable Systems and Networks (DSN), pages 595-604, Florence, Italy, June 2004.
  Acceptance rate: 83/377=22.0%
  William C. Carter Award

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• Firewall Design: Consistency, Completeness and Compactness [PDF][BibTex]
  Mohamed G. Gouda and Alex X. Liu
  In Proceedings ofthe 24th IEEE International Conference on Distributed Computing Systems (ICDCS), pages 320-327, Tokyo, Japan, March 2004.
  Acceptance rate: 72/406=17.7%
  

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Selected Journal Publications:

• Large Scale Characterization of Software Vulnerability Life Cycles
  Muhammad Shahzad, M. Zubair Shafiq, and Alex X. Liu.
  IEEE Transactions on Dependable and Secure Computing (TDSC), in press, 2019.
  

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• Multi-level Model for Video Object Segmentation based on Supervision Optimization
  Yadang Chen, Chuanyan Hao, Alex X. Liu, and Enhua Wu.
  IEEE Transactions on Multimedia (TMM), in press, 2019.
  

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• Predictable Privacy-Preserving Mobile Crowd Sensing: A Tale of Two Roles
  Chengwen Luo, Xiao Liu, Wanli Xue, Yiran Shen, Jianqiang Li, Wen Hu, and Alex X, Liu.
  IEEE/ACM Transactions on Networking (ToN), in press, 2019.
  

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• Counting Human Objects Using Backscattered Radio Frequency Signals
  Han Ding, Jinsong Han, Alex X. Liu, Wei Xi, Jizhong Zhao, Panlong Yang, and Zhiping Jiang.
  IEEE Transactions on Mobile Computing (TMC), in press, 2019.
  

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• FPGA Resource Pooling in Cloud Computing
  Zhuangdi Zhu, Alex X Liu, Fan Zhang, and Fei Chen.
  IEEE Transactions on Cloud Computing (TCC), in press, 2019.
  

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• Fast Splitting Based Tag Identification Algorithm for anti-collision in UHF RFID System
  Jian Su, Zhengguo Sheng, Liangbo Xie, Gang Li, and Alex X. Liu.
  IEEE Transactions on Communications (TCOM), in press, 2019.
  

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• Optimizing Taxi Driver Profit Efficiency: A Spatial Network-based Markov Decision Process Approach
  Xun Zhou, Huigui Rong, Chang Yang, Qun Zhang, Amin Vahedian Khezerlou, Hui Zheng, Zubair Shafiq, and Alex X. Liu.
  IEEE Transactions on Big Data (TBD), in press, 2019.
  

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• Publishing Social Network Data with Privacy Guarantees
  Faraz Ahmed, Alex X. Liu, and Rong Jin.
  IEEE Transactions on Network Science and Engineering (TNSE), in press, 2019.
  

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• Writing in the Air with WiFi Signals for Virtual Reality Devices
  Zhangjie Fu, Jiashuang Xu, Zhuangdi Zhu, Alex X. Liu, and Xingming Sun.
  IEEE Transactions on Mobile Computing (TMC), Vol. 18, No. 2, pages 473-484, February 2019.

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• Identifying and Estimating Persistent Items in Data Streams
  Haipeng Dai, Muhammad Shahzad, Alex X. Liu, Meng Li, and Yuankun Zhong.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 6, pages 2429-2442, December 2018.

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• Minimize the Make-span of Batched Requests for FPGA Pooling in Cloud Computing
  Yangming Zhao, Chen Tian, Zhuangdi Zhu, Jie Cheng, Chunming Qiao, and Alex X. Liu.
  IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 29, No. 11, pages 2514-2527, November 2018.

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• Secure Hashing-Based Verifiable Pattern Matching
  Fei Chen, Donghong Wang, Ronghua Li, Jianyong Chen, Zhong Ming, Alex Liu, Huayi Duan, Cong Wang, and Jing Qin.
  IEEE Transactions on Information Forensics & Security (TIFS), Vol. 13, No. 11, pages 2677-2690, November 2018.

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• Synchronize Inertial Readings from Multiple Mobile Devices in Spatial Dimension'
  Lei Xie, Qingliang Cai, Alex X. Liu, Wei Wang, Yafeng Yin, and Sanglu Lu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 5, pages 2146-2159, October 2018.

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• Semantic Aware Searching over Encrypted Data for Cloud Computing
  Zhangjie Fu, Lili Xia, Xingming Sun, Alex X. Liu, Guowu Xie.
  IEEE Transactions on Information Forensics & Security (TIFS), Vol. 13, No. 9, pages 2359-2371, September 2018.
  

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• Fast Identification of Blocked RFID Tags
  Xiulong Liu, Xin Xie, Xibin Zhao, Keqiu Li, Alex X Liu, Song Guo, and Jie Wu.
  IEEE Transactions on Mobile Computing (TMC), Vol. 17, No. 9, pages 2041-2054, September 2018.
  

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• A Sorted-Partitioning Approach to Fast and Scalable Dynamic Packet Classification
  Sorrachai Yingchareonthawornchai, James Daly, Alex X. Liu, and Eric Torng.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 4, pages 1907-1920, August 2018.
  

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• Constant IP Lookup with FIB Explosion
  Tong Yang, Gaogang Xie, Alex X. Liu, Qiaobin Fu, Yanbiao Li, and Xiaoming Li.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 4, pages 1821-1836, August 2018.
  

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• Wireless Charger Placement for Directional Charging
  Haipeng Dai, Xiaoyu Wang, Alex X Liu, Huizhen Ma, and Guihai Chen.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 4, pages 1865-1878, August 2018.
  

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• Noise Tolerant Localization for Sensor Networks
  Fu Xiao, Lei Chen, Chaoheng Sha, Lijuan Sun, Ruchuan Wang, Alex X Liu, and Faraz Ahmed.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 4, pages 1701-1714, August 2018.
  

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• OpenFunction: An Extensible Data Plane Abstraction Protocol for Platform-Independent Software-Defined Middleboxes
  Chen Tian, Ali Munir, Alex X. Liu, Jie Yang, and Yangming Zhao.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 3, pages 1488-1501, June, 2018.
  

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• CoMan: Managing Bandwidth Across Computing Frameworks in Multiplexed Datacenters
  Wenxin Li, Deke Guo, Alex X Liu, Keqiu Li, Heng Qi, Song Guo, Ali Munir, Xiaoyi Tao.
  IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 29, No. 5, pages 1013-1029, May 2018.
  

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• A Ternary Unification Framework for Optimizing TCAM-Based Packet Classification Systems
  Eric Norige, Alex X. Liu, and Eric Torng.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 2, pages 657-670, April 2018.
  

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• Online Scaling of NFV Service Chains across Geo-distributed Datacenters
  Yongzheng Jia, Zongpeng Li, Franck Le, Alex Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 2, pages 699-710, April 2018.
  

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• Optimizing Internet Transit Routing for Content Delivery Networks
  Faraz Ahmed, M. Zubair Shafiq, Amir R. Khakpour, and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 1, pages 76-89, February, 2018.
  

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• Radiation Constrained Scheduling of Wireless Charging Tasks
  Haipeng Dai, Huizhen Ma, and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 1, pages 314-327, February, 2018.
  

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• Multi-Touch in the Air: Concurrent Micromovement Recognition Using RF Signals
  Lei Xie, Chuyu Wang, Alex X. Liu, Jianqiang Sun, and Sanglu Lu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 1, pages 231-244, February, 2018.
  

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• SCAPE: Safe Charging with Adjustable Power
  Haipeng Dai, Yunhuai Liu, Guihai Chen, Xiaobing Wu, Tian He, Alex X. Liu, and Yang Zhao.
  IEEE/ACM Transactions on Networking (ToN), Vol. 26, No. 1, pages 520-533, February, 2018.
  

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• Aggregation Functions Considering Criteria Interrelationships in Fuzzy Multi-criteria Decision Making: State-of-the-art
  Le Sun, Hai Dong, and Alex X. Liu.
  IEEE Access, Vol 6, pages 68104-68136, 2018.
  

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• Detecting and Localizing End-to-End Performance Degradation for Cellular Data Services Based on TCP Loss Ratio and Round Trip Time
  Faraz Ahmed, Jeffrey Erman, Zihui Ge, Alex X. Liu, Jia Wang, and He Yan.
  IEEE/ACM Transactions on Networking (ToN), Vol. 25, No. 6, pages 3709-3722, December, 2017.
  

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• Safe Charging for Wireless Power Transfer
  Haipeng Dai, Yunhuai Liu, Guihai Chen, Xiaobing Wu, Tian He, Alex X. Liu, and Huizhen Ma.
  IEEE/ACM Transactions on Networking (ToN), Vol. 25, No. 6, pages 3531-3544, December, 2017.
  

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• Dynamic Scaling of Virtualized, Distributed Service Chains: A Case Study of IMS
  Jingpu Duan, Chuan Wu, Franck Le, Alex X. Liu, and Yanghua Peng.
  IEEE Journal on Selected Areas in Communications (JSAC), Vol. 35, No. 11, pages 2501-2511, November, 2017.
  

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• Behavior Based Human Authentication on Touch Screen Devices Using Gestures and Signatures
  Muhammad Shahzad and Alex X. Liu.
  IEEE Transactions on Mobile Computing (TMC), Vol 16, No. 10, Pages 2726-2741, October, 2017.
  

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• Top-K Queries for Categorized RFID Systems
  Xiulong Liu, Keqiu Li, Song Guo, Alex X. Liu, Peng Li, Kun Wang, and Jie Wu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 25, No. 5, pages, 2587-2600, October, 2017.
  

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• A Shifting Framework for Set Queries
  Tong Yang, Alex X. Liu, Muhammad Shahzad, Dongsheng Yang, Qiaobin Fu, Gaogang Xie, and Xiaoming Li.
  IEEE/ACM Transactions on Networking (ToN), Vol. 25, No. 5, pages 3116-3131, October, 2017.
  

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• A Traffic Flow Approach to Early Detection of Gathering Events: Comprehensive Results
  Amin Khezerlou, Xun Zhou, Lufan Li, Zubair Shafiq, Alex X. Liu, and Fan Zhang.
  ACM Transactions on Intelligent Systems and Technology (TIST)). Vol. 8, No. 6, pages 1-24, September, 2017.
  

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• Firewall Fingerprinting and Denial of Firewalling Attacks
  Amir R. Khakpour, Alex X. Liu, Joshua W. Hulst, Zihui Ge, Dan Pei, and Jia Wang.
  IEEE Transactions on Information Forensics & Security (TIFS), Vol. 12, No. 7, pages 1699-1712, July 2017.
  

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• Automated Online Exam Proctoring
  Yousef Atoum, Liping Chen, Alex Liu, Stephen Hsu, and Xiaoming Liu.
  IEEE Transactions on Multimedia (TMM), Vol. 19, No. 7, pages 1609-1624. July 2017.
  

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• STPP: Spatial-Temporal Phase Profiling-Based Method for Relative RFID Tag Localization
  Longfei Shangguan, Zheng Yang, Alex X. Liu, Zimu Zhou, and Yunhao Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 25, No.1, pages 596-609, February 2017.
  

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• PASE: Synthesizing Existing Transport Strategies for Datacenter Networks
  Ali Munir, Ghufran Baig, Syed Muhammad Irteza, Ihsan Ayyub Qazi, Alex X. Liu, and Fahad Dogar.
  IEEE/ACM Transactions on Networking (ToN), Vol. 25, No. 1, pages 320-334, February 2017.
  

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• Multi-category RFID Estimation
  Xiulong Liu, Keqiu Li, Alex X. Liu, Ann Wang, Jie Wu, and Xin Xie.
  IEEE/ACM Transactions on Networking (ToN), Vol. 25, No. 1, pages 264-277, February 2017.
  

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• RFID Estimation with Blocker Tags
  Xiulong Liu, Bin Xiao, Keqiu Li, Alex X Liu, Jie Wu, Xin Xie, and Heng Qi.
  IEEE/ACM Transactions on Networking (ToN), Vol. 25, No. 1, pages 224-237. February, 2017.
  

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• Recognizing Keystrokes Using WiFi Devices
  Kamran Ali, Alex X. Liu, Wei Wang, Muhammad Shahzad.
  IEEE Journal on Selected Areas in Communications (JSAC), Vol. 35, No. 5, pages 1175-1190, January 2017.
  

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• Device-free Human Activity Recognition Using Commercial WiFi Devices
  Wei Wang, Alex X. Liu, Muhammad Shahzad, Kang Ling, and Sanglu Lu.
  IEEE Journal on Selected Areas in Communications (JSAC), Vol. 35, No. 5, pages 1118-1131, January 2017.
  

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• Overlay Automata and Algorithms for Fast and Scalable Regular Expression Matching
  Alex X. Liu and Eric Torng.
  IEEE/ACM Transactions on Networking (ToN), Vol. 24, No.4, pages 2400-2415, August 2016.
  

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• Packet Classification using Binary Content Addressable Memory
  Alex X. Liu, Chad Meiners, and Eric Torng.
  IEEE/ACM Transactions on Networking (ToN), Vol. 24, No. 7, pages 1295-1307, June 2016.
  

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• Characterizing and Optimizing Cellular Network Performance during Crowded Events
  M. Zubair Shafiq, Lusheng Ji, Alex X. Liu, Jeffrey Pang, Shobha Venkataraman, and Jia Wang.
  IEEE/ACM Transactions on Networking (ToN), Vol. 24, No. 3, pages 1308-1321, June 2016.
  

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• Fast and Reliable Detection and Identification of Missing RFID Tags in the Wild
  Muhammad Shahzad and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 24, No. 6, pages 3770-3784, February 2016.
  

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• Accurate and Efficient Per-flow Latency Measurement without Probing and Time Stamping
  Muhammad Shahzad and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 24, No. 6, pages 3477-3492, February 2016.
  

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• A Difference Resolution Approach to Compressing Access Control Lists
  James Daly, Alex X. Liu, and Eric Torng.
  IEEE/ACM Transactions on Networking (ToN), Vol. 24, No.1, pages 610-623, February 2016.
  

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• Freeweb: P2P-Assisted Collaborative Censorship-Resistant Web Browsing
  Haiying Shen, Alex Liu, Guoxin Liu, and Lianyu Zhao
  IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 27, No. 11, page 3226-3241, January 2016.
  

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• Geospatial and Temporal Dynamics of Application Usage in Cellular Data Networks [PDF]
  M. Zubair Shafiq, Lusheng Ji, Alex X. Liu, Jeffrey Pang, and Jia Wang.
  IEEE Transactions on Mobile Computing (TMC), Vol. 14, No. 7, pages 1369-1381, July 2015.
  

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• Privacy Preserving Quantification of Cross-Domain Network Reachability [PDF]
  Fei Chen, Bezawada Bruhadeshwar, and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 23, No. 3, pages 946-958, June, 2015.
  

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• Probabilistic Optimal Tree Hopping for RFID Identification [PDF]
  Muhammad Shahzad and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 23, No. 3, pages 796-809, June, 2015.
  

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• Fast and Accurate Estimation of RFID Tags [PDF]
  Muhammad Shahzad and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN). Vol. 23, No. 1, pages 241-254, February 2015.
  

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• Topological Transformation Approaches to Database Query Processing [PDF]
  Sakti Pramanik, Alok Watve, Alex X. Liu, Chad Meiners, Salman Shahid
  IEEE Transactions on Knowledge and Data Engineering (TKDE). Vol. 27, No. 5, 1438-1451, January, 2015.
  

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• Sampling Bloom Filter-based Detection of Unknown RFID Tags [PDF]
  Xiulong Liu, Heng Qi, Keqiu Li, Ivan Stojmenovic, Alex Liu, Yanming Shen, Wenyu Qu, and Weilian Xue.
  IEEE Transactions on Communications (TCOM). Vol. 63, No. 4, pages 1432-1442, January, 2015.
  

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• Completely Pinpointing the Missing RFID Tags in A Time-efficient Way
  Xiulong Liu, Keqiu Li, Geyong Min, Yanming Shen, Alex X. Liu, and Wenyu Qu.
  IEEE Transactions on Computers (TC). Vol. 64, No. 1, pages 87-96, January 2015.
  

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• Bypassing Space Explosion in High-Speed Regular Expression Matching [PDF]
  Jignesh Patel, Alex X. Liu, and Eric Torng.
  IEEE/ACM Transactions on Networking (ToN). Vol. 22, No. 6, pages 1701-1714, December, 2014.
  

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• Energy-Aware Virtual Network Embedding
  Sen Su, Zhongbao Zhang, Alex X. Liu, Xiang Cheng, Yiwen Wang, and Xinchao Zhao.
  IEEE/ACM Transactions on Networking (ToN).Vol. 22, No. 5, pages 1607 - 1620, October 2014.
  

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• High-Speed Application Protocol Parsing and Extraction for Deep Flow Inspection [PDF]
  Alex X. Liu, Chad Meiners, Eric Norige, Eric Torng.
  IEEE Journal on Selected Areas in Communications (JSAC). Vol. 32, No. 10, pages 1864-1880, October 2014.
  

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• Towards Fast and Optimal Grouping of Regular Expressions via DFA Size Estimation [PDF]
  Tingwen Liu, Alex X. Liu, Jinqiao Shi, Yong Sun, Li Guo.
  IEEE Journal on Selected Areas in Communications (JSAC). Vol. 32, No. 10, pages 1797-1809, October 2014.
  

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• Multiple Bulk Data Transfers Scheduling among Datacenters [PDF]
  Yiwen Wang, Sen Su, Alex X. Liu, and Zhongbao Zhang.
  Special Issue on Communications and Networking in the Cloud, Journal of Computer Networks (COMNET) (Elsevier). Vol. 68, No. 5, pages 123-137, August 2014.
  

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• A Multiple Hashing Approach to Complete Identification of Missing RFID Tags
  Xiulong Liu, Keqiu Li, Geyong Min, Yanming Shen, Alex X. Liu, and Wenyu Qu.
  IEEE Transactions on Communications (TCOM), Vol. 62, No. 3, March 2014.
  

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• Fast Regular Expression Matching Using Small TCAM [PDF]
  Chad R. Meiners, Jignesh Patel, Eric Norige, Alex X. Liu, and Eric Torng.
  IEEE/ACM Transactions on Networking (ToN), Vol. 22, No. 1, pages 94-109, February 2014.
  

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• Large Scale Measurement and Characterization of Cellular Machine-to-Machine Traffic
  M. Zubair Shafiq, Lusheng Ji, Alex X. Liu, Jeffrey Pang, and Jia Wang.
  IEEE/ACM Transactions on Networking (ToN), Vol. 21, No. 6, pages 1960-1973, December 2013.
  

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• Identifying Leaders and Followers in Online Social Networks [PDF]
  M. Zubair Shafiq, Muhammad U. Ilyas, Alex X. Liu, and Hayder Radha.
  IEEE Journal on Selected Areas in Communications (JSAC), Vol. 31, No. 9, pages 618-628, September 2013.
  

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• A Distributed Algorithm for Identifying Information Hubs in Social Networks [PDF]
  Muhammad U. Ilyas, M. Zubair Shafiq, Alex X. Liu, and Hayder Radha.
  IEEE Journal on Selected Areas in Communications (JSAC), Vol. 31, No. 9, pages 629-640, September 2013.
  

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• An Information Theoretical Approach to High-Speed Flow Nature Identification
  Amir R. Khakpour and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 21, No. 4, pages 1076-1089, August 2013.
  

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• Cross-Domain Privacy-Preserving Cooperative Firewall Optimization
  Fei Chen, Bezawada Bruhadeshwar, and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 21, No. 3, pages 857-868, June 2013.
  

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• Dynamic Camouflage Event Based Malicious Node Detection Architecture [PDF]
  Kanthakumar Pongaliur, Li Xiao, and Alex X. Liu.
  Journal of Supercomputing (Springer), Vol. 64, No. 3, pages 717-743, June 2013.
  

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• Quantifying and Verifying Reachability for Access Controlled Networks [PDF]
  Alex X. Liu and Amir R. Khakpour.
  IEEE/ACM Transactions on Networking (ToN), Vol. 21, No. 2, pages 551-565, April 2013.
  

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• Privacy and Integrity Preserving Range Queries in Sensor Networks [PDF]
  Fei Chen and Alex X. Liu.
  IEEE/ACM Transactions on Networking (ToN), Vol. 20, No. 6, pages 1774-1787, December 2012.
  

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• First Step Towards Automatic Correction of Firewall Policy Faults [PDF]
  Fei Chen, Alex X. Liu, JeeHyun Hwang, and Tao Xie.
  ACM Transactions on Autonomous and Adaptive Systems (TAAS), Vol. 7, No. 2, pages 27-49, July 2012.
  

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• TCAMChecker: A Software Approach to the Error Detection and Correction of TCAM-based Networking Systems[PDF]
  M. Zubair Shafiq, Chad Meiners, Zheng Qin, Ke Shen, and Alex Liu.
  Journal of Network and Systems Management (JNSM) (Springer), Vol. 21, No. 3, pages 335-352, May 2012.
  

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• Bit Weaving: A Non-prefix Approach to Compressing Packet Classifiers in TCAMs [PDF]
  Chad R. Meiners, Alex X. Liu, and Eric Torng.
  IEEE/ACM Transactions on Networking (ToN), Vol. 20, No. 2, pages 488-500, April 2012.
  

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• Systematic Structural Testing of Firewall Policies [PDF]
  Jeehyun Hwang, Tao Xie, Fei Chen, and Alex X. Liu.
  IEEE Transactions on Network and Service Management (TNSM), Vol. 9, No. 1, pages 1-11, March 2012.
  

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• Firewall Policy Change-Impact Analysis [PDF]
  Alex X. Liu
  ACM Transactions on Internet Technology (TOIT), Vol. 11, No. 4, pages 15-39, March 2012.
  Note: This paper was selected as the course material in Purdue's Computer Science Course CS 590N ``Logical Methods for Information Security''.

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• Towards High Performance Security Policy Evaluation [PDF]
  Zheng Qin, Fei Chen, Qiang Wang, Alex X. Liu, Zhiguang Qin.
  Journal of Supercomputing (Springer), Vol. 59, No. 3, pages 1577-1595, March, 2012.
  

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• Genome-scale NCRNA homology search using a Hamming distance-based filtration strategy [PDF]
  Yanni Sun, Osama Aljawad, Jikai Lei, Alex Liu.
  BMC Bioinformatics, Vol. 13, No. 3, pages 1-13, March, 2012.
  

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• A Secure Cookie Scheme [PDF]
  Alex X. Liu, Jason M. Kovacs, and Mohamed G. Gouda
  Journal of Computer Networks (COMNET) (Elsevier), Vol. 56, No. 6, pages 1723-1730, January 2012.
  Note: The web security scheme proposed in this paper has been used by Wordpress since version 2.4. Wordpress is a widely used open source content management system. The adoption of our scheme was announced by Ryan Boren, a lead developer of WordPress, in 2007 in his article "Secure Cookies and Passwords". Our paper was also selected as part of the course material in Stanford Computer Science Course CS259 "Security Modeling and Analysis" in 2012.

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• Compressing Network Access Control Lists [PDF]
  Alex X. Liu, Eric Torng, and Chad R. Meiners
  IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 22, No. 12, pages 1969 - 1977, December 2011.
  

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• Designing Fast and Scalable XACML Policy Evaluation Engines [PDF]
  Alex X. Liu, Fei Chen, JeeHyun Hwang, and Tao Xie
  IEEE Transactions on Computers (TC), Vol. 60, No. 12, pages 1802 - 1817, December 2011.
  

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• Privacy Preserving Collaborative Enforcement of Firewall Policies in Virtual Private Networks [PDF]
  Alex X. Liu and Fei Chen
  IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 22, No. 5, pages 887 - 895, May 2011.
  

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• Symmetric Key Approaches to Securing BGP -- A Little Bit Trust is Enough [PDF]
  Bezawada Bruhadeshwar, Sandeep S. Kulkarni, and Alex X. Liu
  IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 22, No. 2, pages 1536-1549, January 2011.
  

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• RFIDGuard: A Lightweight Privacy and Authentication Protocol for Passive RFID Tags [PDF]
  Alex X. Liu, LeRoy A. Bailey, and Adithya H. Krishnamurthy
  Journal of Security and Communication Networks (SCN), Vol. 3, No. 5, pages 384-393, September 2010.
  

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• TCAM Razor: A Systematic Approach Towards Minimizing Packet Classifiers in TCAMs [PDF]
  Alex X. Liu, Chad R. Meiners, and Eric Torng
  IEEE/ACM Transactions on Networking (ToN), Vol. 18, No. 2, pages 490 - 500, April 2010.

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• Complete Redundancy Removal for Packet Classifiers in TCAMs [PDF]
  Alex X. Liu and Mohamed G. Gouda
  IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 21, No. 4, pages 424-437, April 2010.
  Note: This paper was selected as the course material in Purdue's Computer Science Course CS 590N ``Logical Methods for Information Security''.

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• Topological Transformation Approaches to TCAM-Based Packet Classification [PDF]
  Chad R. Meiners, Alex X. Liu, and Eric Torng
  IEEE/ACM Transactions on Networking (ToN), Vol. 19, No. 1, pages 237-250, February 2010..
  

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• Firewall Policy Verification and Troubleshooting [PDF]
  Alex X. Liu
  Journal of Computer Networks (COMNET) (Elsevier), Vol. 53, No. 16, pages 2800-2809, November 2009.
  

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• Firewall Policy Queries [PDF] [BibTex]
  Alex X. Liu and Mohamed G. Gouda
  IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 20, No. 6, pages 766-777, June 2009.
  

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• PAP: A Privacy and Authentication Protocol for Passive RFID Tags [PDF][BibTex]
  Alex X. Liu and LeRoy Bailey
  Journal of Computer Communications (COMCOM) (Elsevier), Vol. 32, Issues 7-10, Pages 1194-1199, May 2009.

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• Diverse Firewall Design [PDF][BibTex]
  Alex X. Liu and Mohamed G. Gouda
  IEEE Transactions on Parallel and Distributed Systems (TPDS), Vol. 19, No. 8. August 2008 (Conference version appeared in DSN-2004 and won William C. Carter Award)
  

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• SPP: An Anti-phishing Single Password Protocol [PDF][BibTex]
  Mohamed G. Gouda, Alex X. Liu, Lok M. Leung, and Mohamed A. Alam
  Journal of Computer Networks (COMNET) (Elsevier), Vol. 51, No. 13, pages 1389-1286, September, 2007
  

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• Structured Firewall Design [PDF][BibTex]
  Mohamed G. Gouda and Alex X. Liu
  Journal of Computer Networks (COMNET) (Elsevier), Vol. 51, No. 4, pages 1106-1120, March 2007
  

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• Key Bundles and Parcels: Secure Communication in Many Groups [PDF][BibTex]
  Eunjin Jung, Alex X. Liu, and Mohamed G. Gouda
  Journal of Computer Networks (COMNET) (Elsevier), Vol. 50, No. 11, pages 1781-1798, August 2006
  

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U.S. Patents

• Optimization of Cellular Network Architecture Based on Device Type-Specific Traffic Dynamics
  Inventors: Jia Wang, Lusheng Ji, Alex X. Liu, Muhammad Zubair Shafiq
  United States Patent Number: US9693237B2.
  Issue Date: 6/27/2017
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US); AT&T Intellectual Property I, L.P., Atlanta, GA (US)
  

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• Cellular Connection Sharing
  Inventors: Lusheng Ji, Jeffery Pang, Jia Wang, Shobha Venkataraman, Zubair Shafiq, and Alex X. Liu
  United States Patent Number: US20170135152
  Issue Date: 02/28/2017
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US); AT&T Intellectual Property I, L.P., Atlanta, GA (US)
  

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• Overlay Automata Approach to Regular Expression Matching for Intrusion Detection and Prevention Systems
  Inventors: Alex X. Liu and Eric Torng
  United States Patent Number: US20150310342A1
  Issue Date: 10/25/2015
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US).
  

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• Online Exam Proctoring System
  Inventors: Stephen Hsu, Xiaoming Liu, and Alex X. Liu
  United States Patent Number: US9154748B2
  Issue Date: 08/04/2015
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US)
  

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• Systematic Framework for Application Protocol Field Extraction
  Inventors: Alex X. Liu, Chad Meiners, and Eric Torng
  United States Patent Number: US8897151
  Issue Date: 11/25/2014
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US)
  

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• Method for Computing Network Reachability
  Inventors: Alex X. Liu, Amir Khakpour
  United States Patent Number: US8887266
  Issue Date: 11/11/2014
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US)
  

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• Regular Expression Matching Using TCAMs for Network Intrusion Detection
  Inventors: Alex X. Liu, Chad Meiners, and Eric Torng
  United States Patent Number: US8666931B2
  Issue Date: 3/4/2014
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US)
  

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• Systematic Approach towards Minimizing Packet Classifiers
  Inventors: Alex X. Liu, Chad Meiners, and Eric Torng
  United States Patent Number: US8654763B2
  Issue Date: 2/18/2014
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US)
  

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• Efficient TCAM-based Packet Classification using Multiple Lookups and Classifier Semantics
  Inventors: Alex X. Liu, Chad Meiners, and Eric Torng
  United States Patent Number: US8462786 B2
  Issue Date: 6/11/2013
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US)
  

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• Bit Weaving Technique for Compressing Packet Classifiers
  Inventors: Alex X. Liu, Chad Meiners, and Eric Torng
  United States Patent Number: US20120096220 A1
  Issue Date: 2/12/2013
  Assignee: Board of Trustees of Michigan State University, East Lansing, MI (US)
  

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• System and Method of Resolving Discrepancies between Diverse Firewall Designs
  Inventors: Mohamed G. Gouda, Alex X. Liu
  United States Patent Number: US20060294577A1
  Issue Date: 05/31/2011
  Assignee: The Board of Regents, University of Texas System.
  

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• System and Method of Firewall Design Utilizing Decision Diagrams
  Inventors: Mohamed G. Gouda, Alex X. Liu
  United States Patent Number: US7818793 B2
  Issue Date: 10/19/2010
  Assignee: The Board of Regents, University of Texas System
  

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• Method and Apparatus for Identifying Redundant Rules in Packet Classifiers
  Inventors: Mohamed G. Gouda, Alex X. Liu
  United States Patent Number: US7136926 B1
  Issue Date: 9/7/2010
  Assignee: The Board of Regents, University of Texas System
  

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• System and Method of Querying Firewalls
  Inventors: Mohamed G. Gouda, Alex X. Liu
  United States Patent Number: US20070016946 A1
  Issue Date: 1/18/2007
  Assignee: The Board of Regents, University of Texas System
  

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Selected Professional Activities

• Journal Editorship:
• Associate Editor, IEEE Transactions on Mobile Computing (TMC), 2018 - present.
• Associate Editor, IEEE Transactions on Dependable and Secure Computing (TDSC), 2015 - present.
• Area Editor, Journal of Computer Communications (COMCOM) (Elsevier), 2009 - present.
• Editor, IEEE/ACM Transactions on Networking (ToN), 2012 - 2017.
• Guest Editor, Special Issue on Advances in Parallelism in Artificial Intelligence, Neurocomputing (Elsevier), 2017 - 2018.
• Conference/Workshop Organization:
• TPC Co-Chair, IFIP Networking, 2019
• TPC Co-Chair, The International Conference on Computer Communications and Networks (ICCCN ), Security, Privacy and Trust Track, 2016, 2015, 2014
• TPC Co-Chair, IEEE International Conference on Network Protocols (ICNP), 2014
• TPC Co-Chair, the 7th workshop on Secure Network Protocols (NPSec 2012)
• Student Activities Chair, SIGMETRICS 2015.
• Finance chair: SIGMETRICS 2010.
• Publication chair: SIGMETRICS 2009.
• Regional Arrangements Committee Member: CCS 2009.
• TPC Membership:
• SIGCOMM: 2016
• SIGMETRICS: 2016, 2015, 2013
• MobiHoc: 2014.
• ICNP: 2013, 2012, 2007.
• INFOCOM: 2010, 2009.
• ICDCS: 2008, 2007.
• WWW: 2007.
• Networking: 2015, 2014
• Performance: 2013.
• SECON: 2015.
• MASCOTS: 2013.
• SecureComm: 2011.

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