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 - Bio - Links

Research

My research generally lies in the area of computer security, with a typical theme being how to build cryptography that is both theoretically sound and meets the requirements of practical use. Recently I've been investigating security issues in third-party cloud computing, cryptography robust against randomness vulnerabilities, new approaches for building the next generation of secure cryptographic hash functions (check out the NIST competition!), and privacy-preserving device tracking (check out Adeona!).

Publications

Thomas Ristenpart and Scott Yilek When Good Randomness Goes Bad: Virtual Machine Reset Vulnerabilities and Hedging Deployed Cryptography Network and Distributed Systems Security - NDSS 2010 Mihir Bellare, Zvika Brakerski, Moni Naor, Thomas Ristenpart, Gil Segev, Hovav Shacham, and Scott Yilek Hedged Public-key Encryption: How to Protect against Bad Randomness Advances in Cryptology - Asiacrypt 2009 Thomas Ristenpart, Eran Tromer, Hovav Shacham, and Stefan Savage Hey, You, Get Off of My Cloud: Exploring Information Leakage in Third-Party Compute Clouds Computer and Communications Security - CCS 2009 Mihir Bellare, Thomas Ristenpart, Phillip Rogaway, and Till Stegers Format-Preserving Encryption Selected Areas in Cryptography - SAC 2009 Mihir Bellare and Thomas Ristenpart Simulation without the Artificial Abort: Simpler Proof and Improved Concrete Security for Waters' IBE Scheme Advances in Cryptology - Eurocrypt 2009 Yevgeniy Dodis, Thomas Ristenpart, and Thomas Shrimpton Salvaging Merkle-Damgard for Practical Applications Advances in Cryptology - Eurocrypt 2009 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. Professional activities: Program committee for Fast Software Encryption 2009. Program committee for Fast Software Encryption 2010.

Links

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