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quesomaster9000 | 10 months ago

And even with the constant `b=BLAKE("ECCFrog512CK2 forever")` there is an open question, while not as problematic as it is with the NIST & SEC curves, it's covered in "How to manipulate curve standards: a white paper for the black hat"[1]

I'm surprised they didn't include the constant in the paper and at least a short justification for this approach, despite stating "This ensures reproducibility and verifiable integrity" in section 3.2, whereas several other curves take the approach of 'smallest valid value that meets all constraints'.

Really they should answer the question of "Why can't `b` be zero... or 1" if they're going for efficiency, given they're already using GLV endomorphisms.

Likewise with the generator, I see no code or mention in the paper about how they selected it.

[1]: https://eprint.iacr.org/2014/571.pdf

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