Jean-Philippe Aumasson
Switzerland
Summary
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RockstarJean-philippe Aumasson is a cryptographer and security executive with 11 years of experience, serving as Chief Security Officer and Co-Founder of Taurus in Lausanne, Switzerland. He is the author of Serious Cryptography and a hands-on contributor to core primitives—having worked on the PHC-winning Argon2 password hasher and improved official BLAKE2 implementations, building on work from his doctoral research that helped design the BLAKE family. At Taurus he led development of FINMA-regulated custody and issuance infrastructure now used by most Swiss banks, and earlier co-founded Teserakt to deliver end-to-end encryption for IoT. He chairs the technical committee creating Swiss DLT custody standards, advises startups and VCs on trusted computing and tokenization, and runs cryptography training for industry engineers. A rare mix of academic cryptanalysis (he developed new attack techniques and broke ciphers in research) and product-focused engineering, he bridges deep algorithmic knowledge with secure, production-grade systems.
11 years of coding experience
Github Skills (13)
testing10
c1710
password-hash10
hash10
passwordhash10
hashing-algorithm10
c1110
multi-threading10
cryptography10
b2b10
security10
commandline-interface7
command-line-interface7
Programming languages (18)
Github contributions (5)
P-H-C/phc-winner-argon2
Oct 2015 - Jun 2021
The password hash Argon2, winner of PHC
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 releases, 221 commits, 78 PRs in 5 years 9 months
Contributions summary:Jean-Philippe primarily focused on developing the core Argon2 password hashing algorithm, which is the primary purpose of the repository. They implemented and refined low-level memory functions, hash function initialization, and the overall memory block filling and finalization procedures. They also updated the test suite, improved argument handling and expanded capabilities of the command-line utility. Additionally, they incorporated updates and code improvements from the original Argon2 designers.
cryptographyhashpasswordscryptpassword-hash
BLAKE2/BLAKE2
Oct 2015 - Dec 2016
BLAKE2 official implementations
Role in this project:Back-end Developer
Back-end DeveloperContributions:31 commits, 5 PRs, 34 pushes in 1 year 1 month
Contributions summary:Jean-Philippe primarily focused on enhancing the official BLAKE2 implementations within the repository. Their contributions involved consistent parameter checks, ensuring robust and reliable functionality across various implementations (ref, sse). The user also added support for B2X functionality by adding xof_length and other relevant changes, in addition to making several improvements to the test procedures for the B2XS.
implementationsblake2
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