Kenji Urushima
Fellow Of CTO Office at GlobalSign K.K.
Tokyo, Japan
Summary
🤩
Rockstar🎓
Top SchoolKenji Urushima is a seasoned information security leader and Fellow of the CTO Office at GlobalSign K.K., with over 20 years' experience spanning PKI, cryptography, digital signatures, incident response and product management. He blends hands-on engineering (notably contributions to the widely used jsrsasign JavaScript cryptography library) with executive roles shaping security strategy, standards compliance and SaaS infrastructure. His background includes running CSIRT/PSIRT operations, quality assurance for cloud services, and advising CTO/CISO-level decisions, giving him rare visibility across research, operations and business development. Certified CISSP with deep familiarity in eIDAS, NIST, FIPS and Common Criteria, he frequently translates complex standards into practical, auditable solutions. Based in Tokyo and educated at Waseda University, he also brings long-term, cross-industry experience from telecoms to enterprise document services. Non-obvious strength: he combines protocol- and standards-level expertise (ASN.1, TPM/HSM, X.509) with pragmatic open-source code contributions that improve real-world cryptographic tooling.
14 years of coding experience
36 years of employment as a software developer
BS, Electrical Engineering, Science and Engineering, BS, Electrical Engineering, Science and Engineering at Waseda University
Japanese, English
Stackoverflow
86reputation
5kreached
1answer
0questions
Github Skills (5)
x50910
rsa10
cryptography10
ecdsa6
javascript6
Programming languages (7)
Github contributions (5)
kjur/jsrsasign
Apr 2012 - Nov 2022
The 'jsrsasign' (RSA-Sign JavaScript Library) is an opensource free cryptography library supporting RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp, CAdES and JSON Web Signature/Token in pure JavaScript.
Role in this project:
Backend Developer & Security Engineer
Backend Developer & Security EngineerContributions:150 releases, 862 commits, 71 PRs in 10 years 8 months
Contributions summary:Kenji's commits primarily involve contributions to the jsrsasign library, specifically related to cryptographic libraries supporting RSA/RSAPSS/ECDSA/DSA and X.509 certificates. The commits focused on release updates, adding code differences to existing files, including improvements to signing and verifying mechanisms. The user also added support for encrypted PKCS#5 RSA private key, and the code suggests their work encompassed both backend development and security aspects.
cmscryptography-librarysigningsignecdh
kjur/www
Jan 2015 - Aug 2022
Contributions:173 commits, 169 pushes, 2 branches in 7 years 8 months
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