Alfred Chen

Publications (Google Scholar, DBLP, ResearchGate)

2024

• [CVPR'24] Intriguing Properties of Diffusion Models: An Empirical Study of the Natural Attack Capability in Text-to-Image Generative Models
  Takami Sato*, Justin Yue*, Nanze Chen* (co-first authors), Ningfei Wang, and Qi Alfred Chen
  IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) 2024. (acceptance rate 23.6% = 2719/11532)
  [PDF] [Project website]

• [NDSS'24] LiDAR Spoofing Meets the New-Gen: Capability Improvements, Broken Assumptions, and New Attack Strategies
  Takami Sato*, Yuki Hayakawa*, Ryo Suzuki*, Yohsuke Shiiki* (co-first authors), Kentaro Yoshioka, and Qi Alfred Chen
  ISOC Network and Distributed System Security Symposium (NDSS) 2024. (acceptance rate 20.2% = 140/694)
  [PDF] [Project website]

• [NDSS'24] Invisible Reflections: Leveraging Infrared Laser Reflections to Target Traffic Sign Perception
  Takami Sato*, Sri Hrushikesh Varma Bhupathiraju* (co-first authors), Michael Clifford, Takeshi Sugawara, Qi Alfred Chen, and Sara Rampazzi
  ISOC Network and Distributed System Security Symposium (NDSS) 2024. (acceptance rate 20.2% = 140/694)
  [PDF] [Project website]

• [Usenix Security'24] On Data Fabrication in Collaborative Vehicular Perception: Attacks and Countermeasures
  Qingzhao Zhang, Shuowei Jin, Ruiyang Zhu, Jiachen Sun, Xumiao Zhang, Qi Alfred Chen, and Z. Morley Mao
  USENIX Security Symposium 2024. (acceptance rate 18.8% = 417/2211)
  [PDF] [Project website]

• [Usenix Security'24] DNN-GP: Diagnosing and Mitigating Model’s Faults Using Latent Concepts
  Shuo Wang, Hongsheng Hu, Jiamin Chang, Benjamin Zi Hao Zhao, Qi Alfred Chen, and Minhui Xue
  USENIX Security Symposium 2024. (acceptance rate 18.8% = 417/2211)
  [PDF]

• [AAAI'24] SlowTrack: Increasing the Latency of Camera-based Perception in Autonomous Driving Using Adversarial Examples
  Chen Ma*, Ningfei Wang* (co-first authors), Qi Alfred Chen, and Chao Shen
  Annual AAAI Conference on Artificial Intelligence (AAAI) 2024 (acceptance rate 23.7% = 2342/9862)
  [PDF] [Project website]

• [VehicleSec'24] Understanding the Internet-Wide Vulnerability Landscape for ROS-based Robotic Vehicles
  Wentao Chen*, Sam Der* (co-first authors), Yunpeng Luo, Fayzah Alshammari, and Qi Alfred Chen
  ISOC Symposium on Vehicle Security and Privacy (VehicleSec) 2024
  [PDF] [Project website]

• [VehicleSec'24] On the Vulnerability of Traffic Light Recognition Systems to Laser Illumination Attacks
  Sri Hrushikesh Varma Bhupathiraju, Takami Sato, Michael Clifford, Takeshi Sugawara, Qi Alfred Chen, and Sara Rampazzi
  ISOC Symposium on Vehicle Security and Privacy (VehicleSec) 2024
  [PDF]

• [VehicleSec'24] A Cross-Verification Approach with Publicly Available Map for Detecting Off-Road Attacks against Lane Detection Systems
  Takami Sato, Ningfei Wang, Yueqiang Cheng, and Qi Alfred Chen
  ISOC Symposium on Vehicle Security and Privacy (VehicleSec) 2024
  [PDF]

2023

• [ICCV'23] Does Physical Adversarial Example Really Matter to Autonomous Driving? Towards System-Level Effect of Adversarial Object Evasion Attack
  Ningfei Wang, Yunpeng Luo, Takami Sato, Kaidi Xu, and Qi Alfred Chen
  International Conference on Computer Vision (ICCV) 2023. (acceptance rate 26.8% = 2160/8068)
  [PDF] [Project website]

• [ICCV'23] Semi-supervised Semantics-guided Adversarial Training for Robust Trajectory Prediction
  Ruochen Jiao, Xiangguo Liu, Takami Sato, Qi Alfred Chen, and Qi Zhu
  International Conference on Computer Vision (ICCV) 2023. (acceptance rate 26.8% = 2160/8068)
  [PDF]

• [ICSE'23] Doppelganger Test Generation for Revealing Bugs in Autonomous Driving Software
  Yuqi Huai, Yuantianyi Chen, Sumaya Almanee, Tuan Ngo, Xiang Liao, Ziwen Wan, Qi Alfred Chen, and Joshua Garcia
  International Conference on Software Engineering (ICSE), 2023. (acceptance rate 26.3% = 209/796)
  [PDF]

• [IROS'23] Lateral-Direction Localization Attack in High-Level Autonomous Driving: Domain-Specific Defense Opportunity via Lane Detection
  Junjie Shen, Ziwen Wan, Yunpeng Luo, and Qi Alfred Chen
  IEEE/RSJ International Conference on Intelligent Robots (IROS) 2023
  [PDF] [Project website]

• [IROS'23] Learning Representation for Anomaly Detection of Vehicle Trajectories
  Ruochen Jiao, Juyang Bai, Xiangguo Liu, Takami Sato, Xiaowei Yuan, Qi Alfred Chen, and Qi Zhu
  IEEE/RSJ International Conference on Intelligent Robots (IROS) 2023
  [PDF]

• [IV'23] Detecting Data Spoofing in Connected Vehicle Based Intelligent Traffic Signal Control Using Infrastructure-Side Sensors and Traffic Invariants
  Junjie Shen, Ziwen Wan, Yunpeng Luo, Yiheng Feng, Z. Morley Mao, and Qi Alfred Chen
  IEEE Intelligent Vehicles Symposium (IV) 2023.
  [PDF] [Project website]

• [VehicleSec’23] WIP: Practical Removal Attacks on LiDAR-based Object Detection in Autonomous Driving
  Takami Sato, Yuki Hayakawa, Ryo Suzuki, Yohsuke Shiiki, Kentaro Yoshioka, and Qi Alfred Chen
  ISOC Symposium on Vehicle Security and Privacy (VehicleSec) 2023.
  [PDF]

• [VehicleSec’23] WIP: Towards the Practicality of the Adversarial Attack on Object Tracking in Autonomous Driving
  Chen Ma, Ningfei Wang, Qi Alfred Chen, and Chao Shen
  ISOC Symposium on Vehicle Security and Privacy (VehicleSec) 2023.
  [PDF]

• [VehicleSec’23] GPS Spoofing Attack Detection on Intersection Movement Assist using One-Class Classification
  Jun Ying, Yiheng Feng, Qi Alfred Chen, and Z. Morley Mao
  ISOC Symposium on Vehicle Security and Privacy (VehicleSec) 2023.
  [PDF]

• [DAC’23 Invited] Invited: Waving the Double-Edged Sword: Building Resilient CAVs with Edge and Cloud Computing
  Xiangguo Liu, Yunpeng Luo, Anthony Goeckner, Trishna Chakraborty, Ruochen Jiao, Ningfei Wang, Yixuan Wang, Takami Sato, Qi Alfred Chen, and Qi Zhu
  ACM/IEEE Design Automation Conference (DAC) 2023.
  [PDF]

2022

• [NDSS'22] Too Afraid to Drive: Systematic Discovery of Semantic DoS Vulnerability in Autonomous Driving Planning under Physical-World Attacks
  Ziwen Wan, Junjie Shen, Jalen Chuang, Xin Xia, Josh Garcia, Jiaqi Ma, and Qi Alfred Chen
  Network and Distributed System Security Symposium (NDSS) 2022. (acceptance rate 16.2% = 83/513)
  [PDF] [Project website]

• [CVPR’22] Towards Driving-Oriented Metric for Lane Detection Models
  Takami Sato and Qi Alfred Chen
  IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) 2022. (acceptance rate 25.3% = 2067/8161)
  [PDF] [Project website]

• [CVPR’22] On Adversarial Robustness of Trajectory Prediction for Autonomous Vehicles
  Qingzhao Zhang, Shengtuo Hu, Jiachen Sun, Qi Alfred Chen, and Z. Morley Mao
  IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) 2022. (acceptance rate 25.3% = 2067/8161)
  [PDF] [Project website]

• [T-ITS’22] On the Cybersecurity of Traffic Signal Control System with Connected Vehicles
  Yiheng Feng, Shihong Huang, Wai Wong, Qi Alfred Chen, Z. Morley Mao, and Henry X. Liu
  IEEE Transactions on Intelligent Transportation Systems (T-ITS) 2022. (Indexed by SCI, Impact Factor 6.492)
  [PDF]

• [ACSAC’22] Play the Imitation Game: Model Extraction Attack against Autonomous Driving Localization
  Qifan Zhang, Junjie Shen, Mingtian Tan, Zhe Zhou, Zhou Li, Qi Alfred Chen, and Haipeng Zhang
  Annual Computer Security Applications Conference (ACSAC) 2022. (acceptance rate 25.3% = 2067/8161)
  [PDF]

• [IV’22] AVMaestro: A Centralized Policy Enforcement Framework for Safe Autonomous-driving Environments
  Ze Zhang, Sanjay Sri Vallabh Singapuram, Qingzhao Zhang, David Ke Hong, Brandon Nguyen, Z Morley Mao, Scott Mahlke, and Qi Alfred Chen
  IEEE Intelligent Vehicles Symposium (IV) 2022.
  [PDF]

• [AutoSec’22] Infrastructure-Aided Defense for Autonomous Driving Systems: Opportunities and Challenges
  Yunpeng Luo, Ningfei Wang, Bo Yu, Shaoshan Liu, and Qi Alfred Chen
  ISOC NDSS Workshop on Automotive and Autonomous Vehicle Security (AutoSec) 2022.
  [PDF]

• [AutoSec’22] PASS: A System-Driven Evaluation Platform for Autonomous Driving Safety and Security
  Zhisheng Hu, Junjie Shen, Shengjian Guo, Xinyang Zhang, Zhenyu Zhong, Qi Alfred Chen, and Kang Li
  ISOC NDSS Workshop on Automotive and Autonomous Vehicle Security (AutoSec) 2022.
  [PDF]

2021

• [S&P’21] Invisible in both Camera and LiDAR: Security of Multi-Sensor Fusion based Perception in Autonomous Driving Under Physical-World Attacks
  Yulong Cao*, Ningfei Wang*, Chaowei Xiao*, Dawei Yang* (co-first authors), Jin Fang, Ruigang Yang, Qi Alfred Chen, Mingyan Liu, and Bo Li
  IEEE Symposium on Security and Privacy (S&P) 2021. (acceptance rate 12.0% = 117/972)
  [PDF] [Project website]

• [USENIX Security’21] Dirty Road Can Attack: Security of Deep Learning based Automated Lane Centering under Physical-World Adversarial Attack
  Takami Sato*, Junjie Shen* (co-first authors), Ningfei Wang, Yunhan Jia, Xue Lin, and Qi Alfred Chen
  USENIX Security Symposium 2021. (acceptance rate 18.7% = 246/1316) NDSS’20 Best Technical Poster Award
  [PDF] [Project website]

• [USENIX Security’21] Automated Discovery of Denial-of-Service Vulnerabilities in Connected Vehicle Protocols
  Shengtuo Hu, Qi Alfred Chen, Jiachen Sun, Yiheng Feng, Z. Morley Mao, and Henry X. Liu
  USENIX Security Symposium 2021. (acceptance rate 18.7% = 246/1316)
  [PDF] [Project website]

• [Sigmetrics’21] A Systematic Framework to Identify Violations of Scenario-dependent Driving Rules in Autonomous Vehicle Software
  Qingzhao Zhang, David Ke Hong, Ze Zhang, Qi Alfred Chen, Scott Mahlke, and Z. Morley Mao
  ACM International Conference on Measurement and Modeling of Computer Systems (Sigmetrics) 2021. (acceptance rate (winter) 12.1%=15/124)
  [PDF]

• [Mobicom’21] A Nationwide Census on WiFi Security Threats: Prevalence, Riskiness, and the Economics
  Di Gao, Hao Lin, Zhenhua Li, Feng Qian, Qi Alfred Chen, Zhiyun Qian, Wei Liu, Liangyi Gong, and Yunhao Liu
  ACM Annual International Conference on Mobile Computing and Networking (Mobicom) 2021. (acceptance rate 15.1%=19/126)
  [PDF]

• [IV’21] End-to-end Uncertainty-based Mitigation of Adversarial Attacks to Automated Lane Centering
  Ruochen Jiao, Hengyi Liang, Takami Sato, Junjie Shen, Qi Alfred Chen, and Qi Zhu
  IEEE Intelligent Vehicles Symposium (IV) 2021.
  [PDF]

• [BMVC’21] On Adversarial Robustness of 3D Point Cloud Classification under Adaptive Attacks
  Jiachen Sun, Karl Koenig, Yulong Cao, Qi Alfred Chen, and Z. Morley Mao
  British Machine Vision Conference (BMVC) 2021. (acceptance rate 36.2%=437/1206)
  [PDF]

• [BMVC’21] Intrinsic Examples: Robust Fingerprinting of Deep Neural Networks
  Siyue Wang, Pu Zhao, Xiao Wang, Sang Chin, Thomas Wahl, Yunsi Fei, Qi Alfred Chen, and Xue Lin
  British Machine Vision Conference (BMVC) 2021. (acceptance rate 36.2%=437/1206)
  [PDF]

• [AutoSec’21] Fooling Perception via Location: A Case of Region-of-Interest Attacks on Traffic Light Detection in Autonomous Driving
  Kanglan Tang, Junjie Shen, and Qi Alfred Chen
  ISOC NDSS Workshop on Automotive and Autonomous Vehicle Security (AutoSec) 2021.
  [PDF]

2020

• [Usenix Security'20] Drift with Devil: Security of Multi-Sensor Fusion based Localization in High-Level Autonomous Driving under GPS Spoofing
  Junjie Shen, Jun Yeon Won, Zeyuan Chen, and Qi Alfred Chen
  USENIX Security Symposium 2020. (acceptance rate 16.3%=158/972) NDSS’19 Distinguished Poster Presentation Award
  [PDF] [Extended Version] [Slides] [Talk] [Project website] [Attack Demo 1] [Attack Demo 2]

• [Usenix Security'20] Towards Robust LiDAR-based Perception in Autonomous Driving: General Black-box Adversarial Sensor Attack and Countermeasures
  Jiachen Sun, Yulong Cao, Qi Alfred Chen, and Z. Morley Mao
  USENIX Security Symposium 2020. (acceptance rate 16.3%=158/972)
  [PDF] [Project website]

• [Usenix Security'20] Plug-N-Pwned: Comprehensive Vulnerability Analysis of OBD-II Dongles as A New Over-the-Air Attack Surface in Automotive IoT
  Haohuang Wen, Qi Alfred Chen, and Zhiqiang Lin
  USENIX Security Symposium 2020. (acceptance rate 16.3%=158/972)
  [PDF]

• [NDSS'20] Automated Cross-Platform Reverse Engineering of CAN Bus Commands from Mobile Apps
  Haohuang Wen, Qingchuan Zhao, Qi Alfred Chen, and Zhiqiang Lin
  etwork and Distributed System Security Symposium (NDSS'20), 2020. (acceptance rate 18.3% = 73/399)
  [PDF]

• [ICSE'20] A Comprehensive Study of Autonomous Vehicle Bugs
  Joshua Garcia, Yang Feng, Junjie Shen, Sumaya Almanee, Yuan Xia, and Qi Alfred Chen
  International Conference on Software Engineering (ICSE'20), 2020. (acceptance rate 23.5% = 129/550)
  [PDF]

• [ICLR'20] Fooling Detection Alone is Not Enough: Adversarial Attack against Multiple Object Tracking
  Yunhan Jia, Yantao Lu, Junjie Shen, Qi Alfred Chen, Hao Chen, Zhenyu Zhong, and Tao Wei
  International Conference on Learning Representations (ICLR'20), 2020. (acceptance rate 26.5% = 687/2594)
  [PDF]

• [AutoSec'20] CVShield: Guarding Sensor Data in Connected Vehicle withTrusted Execution Environment
  Shengtuo Hu, Qi Alfred Chen, Jiwon Joung, Can Carlak, Yiheng Feng, Z. Morley Mao, and Henry X. Liu
  ACM Workshop on Automotive and Aerial Vehicle Security (AutoSec'20), 2020.
  [PDF]

• [TRB'20] Cyber-Vulnerability Analysis for Connected Vehicle Based Traffic Signal Control Systems
  Shihong Huang, Wai Wong, Yiheng Feng, Qi Alfred Chen, Henry X. Liu, and Z. Morley Mao
  Transportation Research Board 2018 Annual Meeting (TRB'20), 2020.
  [PDF]

• [EuroSys'20] Experiences of Landing Machine Learning onto Market-Scale Mobile Malware Detection
  Liangyi Gong, Zhenhua Li, Feng Qian, Zifan Zhang, Qi Alfred Chen, Zhiyun Qian, and Yunhao Liu
  European Systems Conference (EuroSys'20), 2020. (acceptance rate 18.4%=43/234)
  [PDF] [Dataset & Code]

• [Euro S&P'20] AVGuardian: Detecting and Mitigating Publish-Subscribe Overprivilege for Autonomous Vehicle Systems
  David Ke Hong, John Kloosterman, Yuqi Jin, Yulong Cao, Qi Alfred Chen, Scott Mahlke, and Z. Morley Mao
  IEEE European Symposium on Security and Privacy (Euro S&P'20), 2020. (acceptance rate 14.6%=38/261)
  [PDF] [Attack Demo]

2019

• [CCS'19] Adversarial Sensor Attack on LiDAR-based Perception in Autonomous Driving
  Yulong Cao, Chaowei Xiao, Benjamin Cyr, Yimeng Zhou, Won Park, Sara Rampazzi, Qi Alfred Chen, Kevin Fu, and Z. Morley Mao
  Proceedings of the 26th ACM Conference on Computer and Communications Security (CCS'19), London, UK, Nov. 2019. (acceptance rate 16.0% = 149/933)
  [PDF] [BIB] [Website] [Attack demo]

• [CCS'19] Effective and Light-Weight Deobfuscation and Semantic-Aware Attack Detection for PowerShell Scripts
  Zhenyuan Li, Qi Alfred Chen, Chunlin Xiong, Yan Chen, Tiantian Zhu, and Hai Yang
  Proceedings of the 26th ACM Conference on Computer and Communications Security (CCS'19), London, UK, Nov. 2019. (acceptance rate 16.0% = 149/933)
  [PDF] [BIB]

• [Mobisys'19] Understanding Fileless Attacks on Linux-based IoT Devices with HoneyCloud
  Fan Dang, Zhenhua Li, Yunhao Liu, Ennan Zhai, Qi Alfred Chen, Tianyin Xu, Yan Chen, and Jingyu Yang
  Proceedings of the 17th ACM International Conference on Mobile Systems, Applications, and Services (MobiSys'19), Seoul, South Korea, June 2019. (acceptance rate 22.7% = 39/172)
  [PDF] [BIB]

• [Mobisys'19] Understanding and Detecting Overlay-based Android Malware at Market Scales
  Yuxuan Yan, Zhenhua Li, Qi Alfred Chen, Christo Wilson, Tianyin Xu, Ennan Zhai, Yong Li, and Yunhao Liu
  Proceedings of the 17th ACM International Conference on Mobile Systems, Applications, and Services (MobiSys'19), Seoul, South Korea, June 2019. (acceptance rate 22.7% = 39/172)
  [PDF] [BIB]

• [TRB'19] Trajectory-Based Hierarchical Defense Model to Detect Cyber-Attacks on Transportation Infrastructure
  Wai Wong, Shihong Huang, Yiheng Feng, Qi Alfred Chen, Henry X. Liu, and Z. Morley Mao
  Proceedings of the Transportation Research Board 2018 Annual Meeting (TRB'19), Washington, D.C., Jan. 2019.
  [PDF] [BIB]

2018 and before

• Proactive Vulnerability Discovery and Assessment in Smart, Connected Systems Through Systematic Problem Analysis
  Qi Alfred Chen
  Ph.D. Thesis, University of Michigan, June 2018
  [PDF]

• [NDSS'18] Exposing Congestion Attack on Emerging Connected Vehicle based Traffic Signal Control
  Qi Alfred Chen, Yucheng Yin, Yiheng Feng, Z. Morley Mao, and Henry X. Liu
  Proceedings of the 25th Network and Distributed System Security Symposium (NDSS'18), San Diego, Feb. 2018. (acceptance rate 21.5% = 71/331)
  [PDF] [BIB] [Slides] [Website] [Attack demo]
  Media coverage: My article in The Conversation, The Register, Trend Micro, Naked Security, Slashdot, Bleeping Computer, Smart Cities Dive, Boing Boing, The Morning Paper, Michigan Engineer, PriusChat ...

• [CCS'17] Client-side Name Collision Vulnerability in the New gTLD Era: A Systematic Study
  Qi Alfred Chen, Matthew Thomas, Eric Osterweil, Yulong Cao, Jie You, Z. Morley Mao
  Proceedings of the 24th ACM Conference on Computer and Communications Security (CCS'17), Dallas, Oct. 2017. (acceptance rate 18.1% = 151/836)
  [PDF] [BIB] [Slides]

• [NDSS'17] ContexIoT: Towards Providing Contextual Integrity to Appified IoT Platforms
  Yunhan Jack Jia, Qi Alfred Chen, Shiqi Wang, Amir Rahmati, Earlence Fernandes, Z. Morley Mao, and Atul Prakash
  Proceedings of the 24th Network and Distributed System Security Symposium (NDSS'17), San Diego, Feb. 2017. (acceptance rate 16.1% = 68/423)
  [PDF] [BIB] [IoT malware taxonomy]

• [S&P'16] MitM Attack by Name Collision: Cause Analysis and Vulnerability Assessment in the New gTLD Era
  Qi Alfred Chen, Eric Osterweil, Matthew Thomas, and Z. Morley Mao
  Proceedings of the 37th IEEE Symposium on Security and Privacy (S&P'16), San Jose, May 2016. (acceptance rate 13.3% = 55/413)
  [PDF] [BIB] [Slides]
  [US-CERT Alert (TA16-144A)] [RIPE 72 Discussion] [Verisign Enterprise Remediation Suggestions]  [Snort signature]
  Media coverage: SecurityAffairs NakedSecurity SecurityWeek Reddit  SCMagazine HelpNetSecurity SecurityIntelligence...

• [NDSS'16] Kratos: Discovering Inconsistent Security Policy Enforcement in the Android Framework
  Yuru Shao, Jason Ott, Qi Alfred Chen, Zhiyun Qian, and Z. Morley Mao
  Proceedings of the 23rd Network and Distributed System Security Symposium (NDSS'16), San Diego, Feb. 2016. (acceptance rate 15.4% = 60/389)
  [PDF] [BIB] [Vulnerability result website]

• [CCS'15] Static Detection of Packet Injection Vulnerabilities -- A Case for Identifying Attacker-controlled Implicit Information Leaks
  Qi Alfred Chen, Zhiyun Qian, Yunhan Jia, Yuru Shao, and Z. Morley Mao
  Proceedings of the 22nd ACM Conference on Computer and Communications Security (CCS'15), Denver, Oct. 2015. (acceptance rate 19.8% = 128/646)
  [PDF] [BIB] [Slides] [Vulnerability result website]

• [Usenix Security'14] Peeking into Your App without Actually Seeing It: UI State Inference and Novel Android Attacks
  Qi Alfred Chen, Zhiyun Qian, and Z. Morley Mao
  Proceedings of the 23rd USENIX Security Symposium (USENIX Security'14), San Diego, Aug. 2014. (acceptance rate 19.0% = 67/352)
  [PDF] [BIB] [Slides] [Website] [Attack demos] [Lightning videos: 60 sec 90 sec]
  Media coverage: Ars Technica CNET News Slashdot CBS News BBC News NBC News Android Headlines Tom's Guide PC Magazine HotHardware ...

• [TRB'18] Vulnerability of Traffic Control System Under Cyber-Attacks Using Falsified Data
  Yiheng Feng, Shihong Huang, Qi Alfred Chen, Henry X. Liu, and Z. Morley Mao
  Proceedings of the Transportation Research Board 2018 Annual Meeting (TRB'18), Washington, D.C., Jan. 2018. (selected for journal publication with acceptance rate 20.0%)
  [PDF] [BIB]

• [IV'17] Towards Secure and Safe Appified Automated Vehicles
  Yunhan Jack Jia, Ding Zhao, Qi Alfred Chen, and Z. Morley Mao
  Proceedings of the 28th IEEE Intelligent Vehicles Symposium (IV'17), Redondo Beach, Jun. 2017. (selected for oral presentation with acceptance rate 10.0%)
  [PDF] [BIB] [OpenAV project website]

• [IMC'16] Understanding On-device Bufferbloat for Cellular Upload
  Yihua Guo, Feng Qian, Qi Alfred Chen, Z. Morley Mao, and Subhabrata Sen
  Proceedings of the 16th ACM SIGCOMM Internet Measurement Conference (IMC'16), Santa Monica, Nov. 2016. (acceptance rate 25.3% = 46/182)
  [PDF] [BIB]

• [Mobicom'15] Performance Characterization and Call Reliability Problem Diagnosis for Voice over LTE
  Yunhan Jack Jia, Qi Alfred Chen, Z. Morley Mao, Jie Hui, Kranthi Sontineni, Alex Yoon, Samson Kwong, and Kevin Lau
  Proceedings of the 21th ACM Annual International Conference on Mobile Computing and Networking (Mobicom'15), Paris, France, Sept. 2015. (acceptance rate 18.4% = 38/207)
  [PDF] [BIB] [Lightning video]

• [IMC'14] QoE Doctor: Diagnosing Mobile App QoE with Automated UI Control and Cross-layer Analysis
  Qi Alfred Chen, Haokun Luo, Sanae Rosen, Z. Morley Mao, Karthik Iyer, Jie Hui, Kranthi Sontineni, and Kevin Lau
  Proceedings of the 14th ACM Internet Measurement Conference (IMC'14), Vancouver, Canada, Nov. 2014. (acceptance rate 22.9% = 43/188)
  [PDF] [BIB] [Slides] [Tool demos: Post status on Facebook, Post photos on Facebook]

• [Mobicom'14] Discovering Fine-grained RRC State Dynamics and Performance Impacts in Cellular Networks
  Sanae Rosen, Haokun Luo, Qi Alfred Chen, Z. Morley Mao, Jie Hui, Aaron Drake, and Kevin Lau
  Proceedings of the 20th ACM Annual International Conference on Mobile Computing and Networking (Mobicom'14), Maui, Sept. 2014. (acceptance rate 16.4% = 36/220)
  [PDF] [BIB]

• [TRR'18] Vulnerability of Traffic Control System Under Cyberattacks with Falsified Data [PDF] [BIB]
  Yiheng Feng, Shihong Huang, Qi Alfred Chen, Henry X. Liu, and Z. Morley Mao
  Transportation Research Record (TRR), Volume 2672, Issue 1, Page 1-11, Mar. 2018. (Indexed by SCI, Impact Factor 0.695)

• [AsiaCCS'18] No One In The Middle: Enabling Network Access Control Via Transparent Attribution [PDF] [BIB]
  Jeremy Erickson, Qi Alfred Chen, Xiaochen Yu, Erinjen Lin, Robert Levy, and Z. Morley Mao
  Proceedings of the 13th ACM ASIA Conference on Computer and Communications Security (ASIACCS’18), Songdo, Incheon, Korea, June 2018. (acceptance rate 20%)
  

• QoE Inference and Improvement Without End-Host Control [PDF]
  Ashkan Nikravesh, Qi Alfred Chen, Scott Haseley, Xiao Zhu, Geoffrey Challen, and Z. Morley Mao
  Proceedings of the 3rd ACM/IEEE Symposium on Edge Computing (SEC’18), Bellevue, Washington, October 2018.
  

• [Euro S&P'17] Open Doors for Bob and Mallory: Open Port Usage in Android Apps and Security Implications
  Yunhan Jack Jia, Qi Alfred Chen, Yikai Lin, Chao Kong, and Z. Morley Mao
  Proceedings of the 2nd IEEE European Symposium on Security and Privacy (Euro S&P'17), Paris, France, Apr. 2017. (acceptance rate 19.6% = 38/194)
  [PDF] [BIB] [Video demos: Threat model, Attack (CVE-2016-5227), Defense] [Tool release]
  Media coverage: My interview at WXYZ-TV (ABC afflicated) Wired Michigan Engineering TechRepublic Bleeping Computer Android Headlines ...

• An Initial Investigation of Protocol Customization [PDF] [BIB]
  David Ke Hong, Qi Alfred Chen, and Z. Morley Mao
  Proceedings of the 2017 ACM CCS Workshop on Forming an Ecosystem Around Software Transformation (FEAST'17), Dallas, Nov., 2017.
  

• [FC'16] Android UI Deception Revisited: Attacks and Defenses [PDF] [BIB]
  Earlence Fernandes, Qi Alfred Chen, Justin Paupore, Georg Essl, J. Alex Halderman, Z. Morley Mao, and Atul Prakash
  Proceedings of the 20th International Conference on Financial Cryptography and Data Security (FC'16), Barbados, Feb. 2016. (acceptance rate 26%)
  

• QoE Inference Without Application Control [PDF]
  Ashkan Nikravesh, David Ke Hong, Qi Alfred Chen, Harsha V. Madhyastha, and Z. Morley Mao
  Proceedings of the ACM SIGCOMM Workshop on QoE-based Analysis and Management of Data Communication Networks (Internet-QoE'16), Florianopolis, Brazil, Aug. 2016.
  

• Efficient Route Guidance in Vehicular Wireless Networks [PDF] [BIB] [Slides]
  Yu Stephanie Sun, Lei Xie, Qi Alfred Chen, Sanglu Lu, and Daoxu Chen
  Proceedings of IEEE Wireless Communications and Networking Conference (WCNC'14), Istanbul, Turkey, Apr. 2014.
  

• A Confidence-Based Filtering Method for DDoS Attack Defense in Cloud Environment [PDF] [BIB]
  Wanchun Dou, Qi Chen and Jinjun Chen
  Future Generation Computer Systems (FGCS), Volume 29, Issue 7, Pages 1838–1850, Sept. 2013. (Indexed by SCI, Impact Factor 2.639)
  

• CBF: A Packet Filtering Method for DDoS Attack Defense in Cloud Environment [PDF][BIB]
  Qi Chen, Wenmin Lin, Shui Yu, and Wanchun Dou
  Proceedings of the 9th IEEE International Conference on Dependable, Autonomic and Secure Computing (DASC'11), Sydney, Australia, Dec. 2011.
  

Technical Reports/Pre-prints