Daoyuan Wu
Research Assistant Professor

Department of Information Engineering
Chinese University of Hong Kong (CUHK)

Email: dywu [at] ie.cuhk.edu.hk

Gmail: daoyuan0x DBLP | Google Scholar

I am a Research Assistant Professor in Information Engineering at The Chinese University of Hong Kong (CUHK) since August 2019. Prior to CUHK, I earned my PhD degree in 2019 from Singapore Management University (SMU) in the School of Information Systems. My PhD study was generously supported by SMU's Secure Mobile Center (SMC) PhD Scholarship (the only awardee). Before pursuing my PhD in Singapore, I received the M.Phil. in Computing from The Hong Kong Polytechnic University in 2015, and B.E. from Nanjing University of Posts and Telecommunications in 2011.

I am broadly interested in system and network security, with a focus on the vulnerability and privacy research. My major research methodology includes program analysis, network measurement, and data mining or analytics. In particular, I am one of the pioneers in using on-device app crowdsourcing (see our NetMon and MopEye apps) for security and networking research. I am also an expert in developing practical Android static analysis, for which I am leading a long-term project on using search-based static analysis for Android security. Besides publishing papers in top-tier venues (NDSS, USENIX ATC, CoNEXT, and INFOCOM), I have reported many app vulnerabilities on both Android and iOS (over 60 CVEs), as well as one system issue in Android (CVE-2014-7224) and one in iOS (CVE-2015-5921).

I am leading the Vulnerability and Privacy Research (VPR) Lab, which is affiliated with Prof. Kehuan Zhang's LASR.
Positions available: HKPF/Oversea PhD Students in CUHK; Research Engineers and Postdoctoral Fellows in SMU.

Research Areas


Conference Papers


Understanding Android VoIP Security: A System-level Vulnerability Assessment DIMVA '20

En He, Daoyuan Wu*, and Robert H. Deng
We discovered and reported 8 zero-day vulnerabilities in Android VoIP system components. Google acknowledged us with 8 bug bounties.
In Proc. Springer Conference on Detection of Intrusions and Malware & Vulnerability Assessment (DIMVA), Lisboa, Portugal, 2020.


Towards Understanding Android System Vulnerabilities: Techniques and Insights AsiaCCS '19

Daoyuan Wu, Debin Gao, Eric K. T. Cheng, Yichen Cao, Jintao Jiang, and Robert H. Deng
In Proc. ACM Asia Conference on Computer and Communications Security (AsiaCCS), Auckland, New Zealand, 2019. (AR = 58/258 = 22%)


An Empirical Study of Mobile Network Behavior and Application Performance in the Wild IWQoS '19

Shiwei Zhang, Weichao Li, Daoyuan Wu, Bo Jin, Rocky K. C. Chang, Debin Gao, Yi Wang, and Ricky K. P. Mok
In Proc. IEEE/ACM International Symposium on Quality of Service (IWQoS), Phoenix, USA, 2019. (AR = 42/153 = 27.4%)


Understanding Open Ports in Android Applications: Discovery, Diagnosis, and Security Assessment NDSS '19

Daoyuan Wu, Debin Gao, Rocky K. C. Chang, En He, Eric K. T. Cheng, and Robert H. Deng
In Proc. ISOC Network and Distributed System Security Symposium (NDSS), San Diego, USA, 2019. (AR = 89/521 = 17%)


Towards Dynamically Monitoring Android Applications on Non-rooted Devices in the Wild WiSec '18

Xiaoxiao Tang, Yan Lin, Daoyuan Wu, and Debin Gao
In Proc. ACM Conference on Security and Privacy in Wireless and Mobile Networks (WiSec), Stockholm, Sweden, 2018. (AR = 28/78 = 35.9%)


SCLib: A Practical and Lightweight Defense against Component Hijacking in Android Applications CODASPY '18

Daoyuan Wu, Yao Cheng, Debin Gao, Yingjiu Li, and Robert H. Deng
In Proc. ACM Conference on Data and Applications Security and Privacy (CODASPY), Tempe, Arizona, USA, 2018. (8-page short paper)


MopEye: Opportunistic Monitoring of Per-app Mobile Network Performance USENIX ATC '17

Daoyuan Wu, Rocky K. C. Chang, Weichao Li, Eric K. T. Cheng, and Debin Gao
One of the 21 highly-ranked papers of ATC'17. It has enabled our IWQoS'19 and WiSec'18 papers, as well as an INFOCOM'19 paper from SJTU.
In Proc. USENIX Annual Technical Conference (ATC), Santa Clara, USA, 2017. (An earlier poster version was published on December 1, 2015)


Measuring the Declared SDK Versions and Their Consistency with API Calls in Android Apps WASA '17

Daoyuan Wu, Ximing Liu, Jiayun Xu, David Lo, and Debin Gao
It was originally a course project paper done by the first three authors in April 2016. The journal version has been accepted by EMSE.
In Proc. Springer International Conference on Wireless Algorithms, Systems, and Applications (WASA), Guilin, China. (AR = 71/238 = 29.8%)


Demystifying and Puncturing the Inflated Delay in Smartphone-based WiFi Network Measurement CoNEXT '16

Weichao Li, Daoyuan Wu, Rocky K. C. Chang, and Ricky K. P. Mok
In Proc. ACM Conference on emerging Networking EXperiments and Technologies (CoNEXT), Irvine, California, USA. (AR = 36/196 = 18.4%)


Stack Layout Randomization with Minimal Rewriting of Android Binaries ICISC '15

Yu Liang, Xinjie Ma, Daoyuan Wu, Xiaoxiao Tang, Debin Gao, Guojun Peng, Chunfu Jia, and Huanguo Zhang
In Proc. Springer International Conference on Information Security and Cryptology (ICISC), Seoul, Korea. (AR = 23/84 = 27.4%)


On the Accuracy of Smartphone-based Mobile Network Measurement INFOCOM '15

Weichao Li, Ricky K. P. Mok, Daoyuan Wu, and Rocky K. C. Chang
In Proc. IEEE Conference on Computer Communications (INFOCOM), Hong Kong SAR, China. (AR = 316/1,640 = 19.3%)


Indirect File Leaks in Mobile Applications MoST '15

Daoyuan Wu and Rocky K. C. Chang
In Proc. IEEE Mobile Security Technologies (MoST), in conjunction with S&P 2015, San Jose, USA. (AR = 10/33 = 30.3%)


Analyzing Android Browser Apps for file:// Vulnerabilities ISC '14

Daoyuan Wu and Rocky K. C. Chang
Together with the MoST'15 work, we made a pioneer contribution to the Android and iOS WebView security.
In Proc. Springer Information Security Conference (ISC), Hong Kong SAR, China. (Full paper AR = 20/106 = 18.9%)

Journal Articles


Scalable Online Vetting of Android Apps for Measuring Declared SDK Versions and Their Consistency with API Calls EMSE '20

Daoyuan Wu, Debin Gao, and David Lo
Accepted by Empirical Software Engineering. This article extends our preliminary conference version at WASA'17.


Toward Accurate Network Delay Measurement on Android Phones TMC '17

Weichao Li, Daoyuan Wu, Rocky K. C. Chang, and Ricky K. P. Mok
In IEEE Transactions on Mobile Computing, Volume: 17, Issue: 3, 2017. This work extends our INFOCOM'15 paper.

Technical Reports


When Program Analysis Meets Bytecode Search: Targeted and Efficient Inter-procedural Analysis of Modern Android Apps in BackDroid arXiv '20

Daoyuan Wu, Debin Gao, Robert H. Deng, and Rocky K. C. Chang
We started programming BackDroid since December 2015. I will keep leading this search-based static analysis project and make it an impactful work.


MopEye: Monitoring Per-app Network Performance with Zero Measurement Traffic CoNEXT '15 Poster

Daoyuan Wu, Weichao Li, Rocky K. C. Chang, and Debin Gao
In Proc. ACM CoNEXT Student Workshop, in conjunction with CoNEXT 2015, Heidelberg, Germany.


A Sink-driven Approach to Detecting Exposed Component Vulnerabilities in Android Apps arXiv '14

Daoyuan Wu, Xiapu Luo, and Rocky K. C. Chang
An old technical report in 2014. I don't have time to revise it anymore.

Invited Talks


Boosting Android Security through App-, Network-, and System-level Vulnerability Analysis CUHK Seminar '19

In Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China, March 2019.


On-device Crowdsourcing and Bytecode Search for Advancing Android App Analysis HKBU Seminar '19

In Department of Computer Science, Hong Kong Baptist University, Hong Kong SAR, China, January 2019.


Cross-Platform Analysis of Indirect File Leaks in Android and iOS Applications HitCon Pacific '17

In Hacks in Taiwan Conference, Taipei, Taiwan, China, December 2017.


On the Feasibility of Automatically Generating Android Component Hijacking Exploits HitCon '14

In Hacks in Taiwan Conference, Taipei, Taiwan, China, August 2014.


  • 2021 Spring - IEMS5722 Mobile Network Programming and Distributed Server Architecture: TODO.

  • 2020 Fall - IEMS5710 Cryptography, Information Security and Privacy: homepage (only in CUHK) and mirror website (public).

  • 2019 Fall - IEMS5710 Cryptography, Information Security and Privacy: homepage (only in CUHK) and mirror website (public).


  • Current Students:

  • PhD Students: Xiao Yi (at CUHK since 2019; code security) and Zicheng Zhang (at SMU since 2020; Android security).

  • Research Assistants: Mengjie Chen (since 2020; decentralized systems) and Eric Cheng (since 2020; improving BackDroid).

  • Master Students: Lijia Yang (at NUPT since 2020; HTTPS security) and Zulin Gu (at NUPT since 2020; Web measurement).

  • MSc Students at CUHK (20-21): LI Siqin (on FinTech Privacy) and WU Yan (on Code Mining).

  • FYP Students at CUHK (20-21): CHAU Pak Shing, ZHENG Zeqin, and WANG Yixiao (all on Flutter-based app development).

  • Past Students:

  • MSc Students at CUHK (19-20): CHEN Mengjie, FANG Ming, LI Lixiang, and XIONG Weiyan.

  • Master Students: Lingzhi Qiu (at NUPT in 2014 for ICC'15) and Huiya Zhu (at PKUSZ in 2011/12 for ICCET'12).

  • Undergraduate Students: Shiwei Zhang (at SUSTech in 2018 for IWQoS'19) and Zixiong Zhang (at NUPT in 2014 for ICC'15).


Useful Links