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 - 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 (check out Adeona!)
  • 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

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

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 spent the summer of 2007 visiting Tadayoshi Kohno at the University of Washington.

I spent the spring of 2008 visiting Thomas Shrimpton at the University of Lugano, Switzerland.

I'm on the Program Committee for Fast Software Encryption 2009.
Links
Mihir's homepage
Crypto and Security group homepage
IACR E-Print complete contents
Crypto and Security Conferences