John Underhill
Chief Executive Officer at QRCS Corporation
Ottawa, Ontario, Canada
Summary
👤
Senior🎓
Top SchoolJohn Underhill is a cryptographer and software leader with 11 years of experience, currently serving as CEO of QRCS Corporation where he also acts as CTO and chief architect of post-quantum technologies. He is the author of three post-quantum cryptographic libraries (CEX++, CEX .NET, and QSC) and numerous symmetric ciphers, key management schemes, encrypted tunneling protocols, and multi-party cryptosystems. Fluent in more than a dozen programming languages, he blends deep cryptographic research with hands-on secure systems design and network engineering. John has a track record of turning advanced cryptographic primitives into practical, deployable libraries and products, and has led a security-focused company (Digital Freedom Defence) as CEO. Based in Ottawa, he pairs academic grounding from Carleton University with an unusually broad implementation skillset that spans low-level crypto to system architecture.
11 years of coding experience
Bachelor of Science - BS, Bachelor of Science - BS at Carleton University
Github Skills (59)
openpgp10
twofish10
bouncy-castle10
fhe10
post-quantum-cryptography10
public-key-cryptography10
aes-gcm10
cryptography10
libsodium10
castle10
cpp10
homomorphic-encryption10
post-quantum9
rijndael9
cryptanalysis9
Programming languages (4)
Github contributions (5)
QRCS-CORP/QSC
May 2019 - Aug 2022
Contributions:33 commits, 93 pushes, 1 branch in 3 years 4 months
Steppenwolfe65/GMSS-NET
Jul 2015 - Mar 2020
Contributions:3 pushes, 1 branch in 4 years 9 months
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.