Sambuddho Chakravarty

email :

About me : I am recent PhD gradaute of the Computer Science Department of Columbia University, New York.
I work with Prof. Angelos D. Keromytis

Thesis title: Traffic Analysis Attacks and Defenses in Low Latency Anonymous Communication (available on request)

My present research involves exploring and studying attacks in low latency anonymity preserving networks, defenses against them and ways to identify potential adversaries. I am interested in pursuing research in areas related to Network Anonymity, Privacy, Network Security and Networked and Distributed Systems in general.

Publications

  1. S. Chakravarty, G. Portokalidis, M. Polychronakis and A. D. Keromytis. Detection and Analysis of Eavesdropping in Anonymous Communication Networks. Submitted to International Journal of Information Security (IJIS).
  2. S. Chakravarty, M. V. Barbera, G. Portokalidis, M. Polychronakis and A. D. Keromytis. On the Effectiveness of Traffic Analysis Against Anonymity Networks Using Flow Records. To appear in the Proceedings of the 15th Passive and Active Measurement Conference (PAM). March 2014, Los Angeles, CA.
  3. S. Chakravarty, G. Portokalidis, M. Polychronakis and A. D. Keromytis. Detecting Traffic Snooping in Tor Using Decoys. International Symposium on Recent Advances in Intrusion Detection (RAID) pp. 222 - 241, Menlo Park, CA, September 2011
  4. S. Chakravarty, A. Stavrou, and A. D. Keromytis. Traffic Analysis Against Low-Latency Anonymity Networks Using Available Bandwidth Estimation. In Proceedings of the 15th European Symposium on Research in Computer Security (ESORICS), pp. 249 - 267 Athens , Greece , September 2010
  5. S. Chakravarty, A. Stavrou, and A. D. Keromytis. Identifying Proxy Nodes in a Tor Anonymization Circuit. In Proceedigs of 2nd Workshop on Security and Privacy in Telecommunications and Information Systems (SePTIS), pp. 633 - 639. Bali, Indonesia, December 2008
  6. A. Dutta, S. Chakravarty, K. Taniuchi, V. Fajardo, Y. Ohba, D. Famolari, H. Schulzrinne An Experimental Study of Location Assisted Proactive Handover. In Proceedings of 50th IEEE Global Communications Conference (GLOBECOMM), Washington DC, USA , December 2007

Technical Reports

  1. S. Chakravarty, M. V. Barbera, G. Portokalidis, M. Polychronakis and A. D. Keromytis. On the Effectiveness of Traffic Analysis Against Anonymity Networks Using Flow Records.Technical Report cucs-019-13, Columbia University, New York, NY, USA, July 2013
  2. S.Chakravarty, G. Portokalidis, M. Polychronakis, and A. D. Keromytis. Detecting Traffic Snooping in Anonymity Networks Using Decoys. Technical Report cucs-005-11, Columbia University , New York , NY , USA, February 2011.
  3. S.Chakravarty, A.Stavrou, and A. D. Keromytis. Approximating a Global Passive Adversary Against Tor. Technical Report cucs-038-08, Columbia University , New York , NY , USA, August 2008.
  4. S.Chakravarty, A.Stavrou, and A. D. Keromytis. LinkWidth: A Method to Measure Link Capacity and Available Bandwidth using Single-End Probes. Technical Report cucs-002-08, Columbia University , New York , NY , USA, January 2008.

Education

Columbia University, New York, NY
Ph.D.(Computer Science) 2014

Columbia University, New York, NY
M.Phil.(Computer Science) 2010

Columbia University, New York, NY
M.S.(Computer Science) 2007

Delhi University, Delhi, India
B.S.(Computer Science) 2004

Complete CV available on request.