Thomas Ristenpart

UCSD Security and Cryptography Group

Email: tristenp at cs dot ucsd dot edu
Phone: 858-534-8833 (office)
Office: EBU3B Room 4242

Mailing Address:
Department of Computer Science and Engineering
EBU3B, Room 4242
9500 Gilman Drive, Mail Code 0404
La Jolla, CA 92093-0404
Publications - CV - Research summary -Bio - Links
Research
My research is within computer security and cryptography, which together span quite a wide range of topics. Some of my recent projects include developing new approaches for
  • privacy-preserving device tracking
  • building secure cryptographic hash functions,
  • securing multiparty signature schemes against rogue-key attacks, and
  • protecting computer systems from malware (viruses, spyware, etc.).
Speaking of hash functions, be sure to check out the NIST hash competition for developing a new standard for cryptographic hash functions.
Publications

Mihir Bellare, Marc Fischlin, Adam O'Neill, and Thomas Ristenpart
Deterministic Encryption: Definitional Equivalences and Constructions without Random Oracles
Advances in Cryptology - CRYPTO 2008, to appear

Thomas Ristenpart, Gabriel Maganis, Arvind Krishnamurthy, and Tadayoshi Kohno
Privacy-preserving Location Tracking of Lost or Stolen Devices: Cryptographic Techniques and Replacing Trusted Third Parties with DHTs.
USENIX Security 2008, to appear

Thomas Ristenpart and Thomas Shrimpton
How to Build a Hash Function from any Collision-Resistant Function
Advances in Cryptology - Asiacrypt 2007

Mihir Bellare and Thomas Ristenpart
Hash Functions in the Dedicated-Key Setting: Design Choices and MPP Transforms
International Colloquim on Automata, Languages, and Programming - ICALP 2007

Thomas Ristenpart and Scott Yilek
The Power of Proofs-of-Possession: Securing Multiparty Signatures against Rogue-Key Attacks
Advances in Cryptology - Eurocrypt 2007

Thomas Ristenpart and Phillip Rogaway
How to Enrich the Message Space of a Cipher
Fast Software Encryption 2007

Francis Hsu, Hao Chen, Thomas Ristenpart, Jason Li, and Zhendong Su
Back to the Future: A Framework for Automatic Malware Removal
In Proc. Annual Computer Security Applications Conference, ACSAC 2006

Mihir Bellare and Thomas Ristenpart
Multi-Property-Preserving Hash Domain Extension and the EMD Transform
Advances in Cryptology - Asiacrypt 2006, an earlier version appeared at the NIST Second Cryptographic Hash Workshop



Thomas Ristenpart
Time Stamp Synchronization of Distributed Sensor Logs: Impossibility Results and Approximation Algorithms (pdf)
UC Davis Masters thesis, September 2005

Thomas Ristenpart
Insecurity of Tweak Chain Hashing
Unpublished Manuscript, December 2003

Brief Bio
I am currently a PhD student in the Computer Science and Engineering department at the University of California at San Diego where I am a member of the Security and Cryptography Group. I have the privilege of working with Mihir Bellare. In September 2005, I received my Master's degree from the University of California at Davis, where I was a part of the security group (working with Matt Bishop, Hao Chen, and Zhendong Su) and the cryptography group (working with Phillip Rogaway). I also received my Bachelor's from UC Davis in June 2003.

I'm currently visiting Thomas Shrimpton at the University of Lugano, Switzerland.

I spent the summer of 2007 working with Tadayoshi Kohno at the University of Washington.

Links
Mihir's homepage
Crypto and Security group homepage
IACR E-Print complete contents
Crypto and Security Conferences