* Dave Cohen <davecohe...@gmail.com> [190419 10:25]: > I'm working on code that signs a message with an ed25519 key. > > I expected that when signing the same message over and over, I'd get a > different signature each time. > > But I find when I run the test (below) more than once, I get the same > signature bytes each time. Here's sample (identical) output from two > consecutive tests:
>From Wikipedia (https://en.wikipedia.org/wiki/EdDSA): Like other discrete-log-based signature schemes, EdDSA uses a secret value called a nonce unique to each signature. In the signature schemes DSA and ECDSA, this nonce is traditionally generated randomly for each signature.... In contrast, EdDSA chooses the nonce deterministically as the hash of the private key and the message. I've snipped quite a bit; you should read the link. From this I would expect the signature to be the same each time for a given message. ...Marvin -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
