Department of Electrical Engineering
Affiliate Faculty, Center for Information Technology Policy
Links: [About Me] [Publications] [Open Positions]
I am interested in building secure and privacy preserving systems. My current interests include the domains
of privacy enhancing technologies, trustworthy social systems, and Internet/network security. My research
draws on techniques from computer networks & distributed systems, large scale machine learning,
complex networks/network science, and applied cryptography.
Please see my publications page for more details.
Communication Security and Privacy --- ELE 574, Spring 2014.
Privacy Enhancing Technologies
Trustworthy Social Systems
- Papers: [CCS 2007]
- We proposed the design of next generation anonymity systems that scale to tens
of millions of users, and also found several vulnerabilities in anonymity systems.
Our work has influenced the design and threat model of deployed systems such as
Tor and I2P.
- Papers: [NDSS 2009]
- We proposed solutions to security and privacy issues in online social networks (OSNs), such as detecting malicious
(Sybil) accounts in OSNs and privacy preserving OSN architectures.
In recent work, we detected real world Sybil attacks in the Twitter network, and performed the largest measurement study of the Google+ network.
- Press: New Scientist,
MIT Technology Review
- Papers: [HotNets 2009]
- We proposed defenses against botnets, denial of service attacks, and Sybil attacks. Our work demonstrates the use of
large scale machine learning techniques to analyze complex network structures for attack isolation. We applied our
techniques to Internet networks, social networks, and even biological gene networks.
- Press: Computing Now,
Program co-chair, Workshop on Hot Topics in Privacy Enhancing Technologies HotPETs 2014.
Program committee member, Privacy Enhancing Technologies Symposium PETS 2014.
Program committee member, International Conference on Weblogs and Social Media ICWSM 2014.
Program committee member, Network and Distributed System Security Symposium NDSS 2014.
Program committee member, International World Wide Web Conference WWW 2014.