Claude Code Debugs Low-Level Bug in Post-Quantum Cryptography Implementation
By
Bogdanp
Hot, fresh, and worth queueing round the block for.
Summary
The author describes their experience implementing ML-DSA, a post-quantum signature algorithm, in Go over four days. Despite completing the implementation, the verification function consistently rejected valid signatures. After exhausting debugging attempts, the author turned to Claude Code, which successfully identified a non-obvious low-level bug in the cryptography implementation that was causing the verification failures.
Key quotes
· 4 pulledI wrote a new Go implementation of ML-DSA, a post-quantum signature algorithm specified by NIST last summer.
Verify was always rejecting valid signatures.
I was exhausted, so I tried debug
Surprisingly (to me) Claude Code debugged my new ML-DSA implementation faster than I would have, finding the non-obvious low-level issue that was making Verify fail.
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