Daiki Ueno
Principal Software Engineer at Free Software Foundation
Tokyo, Japan
Summary
🤩
Rockstar🎓
Top SchoolDaiki Ueno is a Principal Software Engineer based in Tokyo with 23 years of experience focused on security protocols, cryptography, and secure coding across major open-source projects and enterprise Linux. At Red Hat he leads work migrating OS components to post-quantum cryptography and helped deliver a FIPS-compliant Go package for RHEL, reflecting deep expertise in both applied cryptography and compliance. A prolific contributor to foundational projects—OpenSSL, libcurl, libssh2, ngtcp2 and the TLS fuzzer—he repeatedly improves authentication, QUIC/HTTP3, and TLS implementations and test coverage. He also maintains GNU internationalization tooling and has longstanding roles in GNOME and the Free Software Foundation, blending systems-level engineering with community stewardship. Notably, his contributions often bridge low-level crypto changes and practical interoperability (e.g., ssh-agent APIs, GnuTLS backends, and QUIC OpenSSL/GnuTLS integration), making him a rare generalist who moves securely from protocol research to production-grade implementation.
23 years of coding experience
17 years of employment as a software developer
Doctor of Information and Computer Science, Computer and Information Sciences, General, Doctor of Information and Computer Science, Computer and Information Sciences, General at Waseda University
English, Japanese, Czech
Github Skills (73)
confidential-computing10
python10
testing10
sgx10
test-framework10
c1110
security10
glib10
c1710
mtls10
automation10
gtk10
network-protocol10
rest-api10
clutter10
Programming languages (21)
Github contributions (5)
tlsfuzzer/tlsfuzzer
Jun 2018 - Dec 2021
SSL and TLS protocol test suite and fuzzer
Role in this project:
Security Engineer & Test Automation Engineer
Security Engineer & Test Automation EngineerContributions:27 reviews, 11 commits, 13 PRs in 3 years 7 months
Contributions summary:Daiki contributed to the `tlsfuzzer/tlsfuzzer` project, focusing on improving the test suite's coverage and robustness. Their work included modifying existing test scripts to handle specific TLS protocol nuances, such as version negotiation and record size limits. They added new test cases to validate server behavior regarding edge cases, including error handling and the omission of extensions. Furthermore, the user fixed typos and improved the test suite's organization by addressing test name duplication and adding the ability to set a timeout for testing.
security-vulnerabilitytesting-toolsdrowntlslitetest-automation
keylime/keylime
Sep 2021 - Jul 2022
A CNCF Project to Bootstrap & Maintain Trust on the Edge / Cloud and IoT
Role in this project:Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:14 reviews, 8 commits, 5 PRs in 9 months
Contributions summary:Daiki primarily contributed to the Keylime project by implementing and refactoring backend components, with a focus on security-related aspects. Their work included fixing typos and improving the robustness of the cloud verifier, including the support for the /notifications/revocation REST API. They also optimized the code by deferring loading PyZMQ and made changes to the IMA module and its entry parsing, making it stricter and more accurate. Further contributions focused on CI improvements and running lint checks with Python 3.6.
securitytpmedgeattestationcloud
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