I would like to proof that I am in possession of private key
sk for public key
Therefore I am signing a constant message
m using libsodium's
crypto_sign function. The signed message (
signature + m) is then published.
Ed25519 as digital signature scheme.
- Does the reuse of a constant message might introduce any attack vectors?
The libsodium documentation on
Verifiers need to already know and ultimately trust a public key before messages signed using it can be verified.
Is that information relevant for my case as I actually do not want to verify the message, but want to proof the possession of