Comment by tob_scott_a

To test a Claude Skill for analyzing cryptographic implementations of cryptographic side-channels ([1] see constant-time-analysis), I had Claude vibe-code an Ed448 implementation.

This includes:

1. The Ed448 signature algorithm

2. The Edwards448 elliptic curve group (which could conceivably be used for ECDH)

3. The Decaf448 prime-order group (a much better target for doing non-EdDSA things with)

I've been putting off reviewing it and making the implementation public (as it was an exercise in "is this skill a sufficient guard-rail against implementation error" more than anything), but if there's any interest in this from the Go community, I'll try to prioritize it later this year.

(I'm not publishing it without approval from the rest of the cryptography team, which requires an internal review.)

But if you're curious about the efficacy of the Skill, it did discover https://github.com/RustCrypto/signatures/security/advisories...

[1] https://github.com/trailofbits/skills