Frost signature coordinator randomization (anti-exfil) #204
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LLFourn
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Jan 28, 2025
LLFourn
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Dunno how I missed this before. Also forgot to add the constraints on Out.
Sometimes it's useful to have a possibly zero keypair.
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Creates another session creation method that takes an rng. This ensures that the final nonce R (and by implication the s) in the signature will be indistinguishable from random even to all those who knew the parameters ahead of time. This stops signers from contriving the final nonce even if they are all corrupt.
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