About Me

I'm currently a PhD student at Columbia University. My advisor is prof. Angelos D. Keromytis. I graduated from National Technical University of Athens (NTUA), where I studied in the Electrical Engineering & Computer Science Department.

My research interests include systems & network security, binary instrumentation and privacy. More information is available in my resume [short version].


Email: theofilos [at] cs.columbia.edu Network Security Lab
Department of Computer Science
Columbia University

522 Computer Science Building
1214 Amsterdam Avenue, M.C. 0401
New York, NY 10027, USA

Conference Publications

  1. Theofilos Petsios, Adrian Tang, Salvatore Stolfo, Angelos D. Keromytis, and Suman Jana. NEZHA: Efficient Domain-independent Differential Testing. In 38th IEEE Symposium on Security and Privacy (S&P), San Jose, CA, May 2017 (to appear).
  2. Marios Pomonis, Theofilos Petsios, Michalis Polychronakis, Angelos D. Keromytis, and Vasileios P. Kemerlis. kR^X: Comprehensive Kernel Protection against Just-In-Time Code Reuse. In Proceedings of the twelveth European Conference on Computer Systems (EuroSys), Belgrade, Servia, April 2017 (to appear).
  3. Theofilos Petsios, Vasileios P. Kemerlis, Michalis Polychronakis, Angelos D. Keromytis. "DynaGuard: Armoring Canary-based Protections against Brute-force Attacks". In Proceedings of the 31th Annual Computer Security Applications Conference (ACSAC), December 2015. [pdf] [slides] [software]
  4. Iasonas Polakis, George Argyros, Theofilos Petsios, Suphannee Sivakorn, Angelos D. Keromytis "Where’s Wally? Precise User Discovery Attacks in Location Proximity Services" . In Proceedings of the 22nd ACM Conference on Computer and Communications Security (CCS), October 2015. [pdf] [slides] [software]
  5. Marios Pomonis, Theofilos Petsios, Kangkook Jee, Michalis Polychronakis, and Angelos D. Keromytis. "IntFlow: Improving the Accuracy of Arithmetic Error Detection Using Information Flow Tracking". In Proceedings of the 30th Annual Computer Security Applications Conference (ACSAC), December 2014. [pdf] [slides] [software]
  6. M. Lecuyer, G. Ducoffe, F. Lan, A. Papancea, T. Petsios, R. Spahn, A. Chaintreau, and R. Geambasu, “XRay: Enhancing the Web's Transparency with Differential Correlation.”, in Proceedings of the USENIX Security Symposium, August 2014. [pdf] [slides] [website] [software]

Journal Publications

  1. George Argyros, Theofilos Petsios, Suphannee Sivakorn, Angelos D. Keromytis, and Jason Polakis. Evaluating the Privacy Guarantees of Location Proximity Services. In ACM Transactions on Privacy and Security (TOPS) (formerly known as TISSEC). [to appear]