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Algorithms and protocols for creating signatures to documents, and verifying such signatures. These are normally asymmetric, for symmetric signatures see [mac].

3 votes
0 answers
37 views

Converting a KEM with known associated public key into a signature efficiently

Alice challenges Bob to generate a signature S for a challenge input D. … *PS: Assume a hash based signature scheme is not allowed. I'm curious about generic and efficient ways to convert asymmetric KEMs into signatures, not trying to recreate SPHINCS+. …
oaky_0ffc's user avatar
1 vote

Can Ed25519 signature be used as a base for ChaCha20 secret key?

A signature is not intended to be secure key material and can not be used as such. … Notably, this method of key derivation will fail if the signature scheme used allows recovering the public parameters from a valid signature(which is a property for some signature schemes). *** Why the …
oaky_0ffc's user avatar