Sein Coray
Scientific Advisor at Swiss Federal Administration
Greater Bern Area Switzerland
Summary
🤩
Rockstar🎓
Top SchoolSein Coray is a Scientific Advisor based in the Greater Bern Area with 10 years of experience at the intersection of academic research and applied software engineering. With a Master's in Computer Science from the University of Basel (top marks) he has moved from student and research assistant roles into advisory work for the Swiss Federal Administration, bringing rigorous analytical skills to public-sector challenges. He is an experienced back-end developer and notable open-source contributor to the high-profile hashcat project, where he improved hash parsing, added new hash-mode support (including PKZIP and nested sha1/md5 constructs) and optimized OpenCL kernels for performance. Sein combines hands-on systems and network support experience from Paul Scherrer Institut with research-grade software engineering, making him adept at turning complex cryptographic and data-processing problems into robust, performant solutions. Colleagues describe him as methodical and quietly impactful—someone who frequently improves core tooling rather than seeking the spotlight.
10 years of coding experience
Matura, Angewandte Mathematik und Physik, Matura, Angewandte Mathematik und Physik at Gymnasium OberwilBachelor's Degree, Computer Science, 5.2/6, Bachelor's Degree, Computer Science, 5.2/6 at Universität BaselMaster's degree, Computer Science, 5.8/6, Master's degree, Computer Science, 5.8/6 at University of Basel
English, German, French
Github Skills (6)
c1710
opencl10
algorithms10
cracking10
c1110
hashcat10
Programming languages (9)
Github contributions (5)
hashcat/hashcat
Oct 2018 - Jan 2023
World's fastest and most advanced password recovery utility
Role in this project:
Back-end Developer
Back-end DeveloperContributions:83 commits, 38 PRs, 58 comments in 4 years 3 months
Contributions summary:Sein primarily contributed to the password cracking utility, implementing improvements to the parsing of hash separators and expanding functionality to support new hash modes, specifically for PKZIP files and the sha1(md5(md5($pass))) algorithm. Their work involved modifying the core code base, with changes visible in the `src/interface.c` file, and creating related test modules. They also made performance optimizations to OpenCL kernels for improved cracking speed.
cudapassword-generatorpassword-managerfastestpassword
hashtopolis/agent-csharp
Oct 2018 - May 2021
Contributions:4 commits, 3 pushes, 3 branches in 2 years 7 months
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