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May
21
comment Ed25519 with R replaced by H(RAM)?
Would you post the numbers you are using?
May
20
awarded  Supporter
May
20
awarded  Teacher
May
20
comment Is this EdDSA modification secure?
$B$ is a base point for the curve. That is, $A = a*B$ where $a$ is the secret key and $A$ is the public key.
May
20
answered Ed25519 with R replaced by H(RAM)?
May
20
awarded  Scholar
May
20
comment Is this EdDSA modification secure?
True. This uses the fact that EdDSA derives the secret session key $r$ from the secret key $a$ and the message $M$. So, supposing a nonce were used to salt the derivation of $r$, does this problem remain?
May
20
accepted Is this EdDSA modification secure?
May
18
asked Is this EdDSA modification secure?