About me

I'm an Associate Professor of cryptography in the Department of Combinatorics & Optimization at the University of Waterloo in Waterloo, Ontario, Canada. My research focuses on improving the security of Internet cryptography protocols such as SSL/TLS and SSH, and developing practical quantum-resistant cryptosystems.

Research

My research interests include:

• Applied cryptography: key exchange protocols; post-quantum cryptography; digital signatures; public key encryption; client puzzles / proofs of work; elliptic curve cryptography; quantum cryptography
• Internet security: network security protocols (SSL/TLS, SSH, Tor, …); public key infrastructure (PKI); authentication

My full list of publications and presentations are available online. My most recent papers are:

Pictures

I'm fortunate to be able to travel a lot. I take lots of pictures on my trips. The best of my photos are posted in my galleries. My most recent galleres are:

Blog

I have a blog. I have not been very good at updating it lately, but here are my most recent posts:

• 2024-02-21: Security analysis of Apple's iMessage PQ3 protocol
• 2024-02-06: Launch of the Linux Foundation's Post-Quantum Cryptography Alliance
• 2023-10-22: New York Times article on post-quantum cryptography
• 2020-04-20: Joint Statement on Contact Tracing
• 2019-01-30: NIST Post-Quantum Crypto Standardization project round 2

Contact information »