--- Log opened Tue Mar 07 00:00:03 2023
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05:21 < andytoshi> ademan[m]: if you are doing an interactive multisignature, you can't generally use deterministic nonces
05:21 < andytoshi> then there are a few cases where it makes sense to tweak a deterministic nonce somehow..
05:22 < andytoshi> one is to just mix randomness into the hash (this is a "synthetic nonce"), but still make sure that your key and the message are in the hash. this has all the benefits of synthetic nonces (except being able to verify the result given only the secret key) and protects against potential side-channel attacks
05:23 < andytoshi> another is to mix external randomness into the nonce. this is "anti-exfiltration", which can protect against a single compromised device
05:23 < andytoshi> another is to tweak the nonce with some commitment to data "sign-to-contract"
05:24 < andytoshi> another is to xor some data into the nonce "encrypting stuff to yourself in a signature, up to 32 bytes per sig". AFAIK nobody has ever found a real use case for this, but i want there to be one
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--- Log closed Wed Mar 08 00:00:04 2023