curprev11:2711:27, 21 April 2023 2a01:cb15:803d:b000:616b:a647:d2f3:b16ctalk 14,943 bytes−3 About the initial paragraph starting with "Informally" in the Definition section: A verifying algorithm efficiently verifies the authenticity of the message given the same key and not a different one. The key secret is shared.undo
curprev07:4207:42, 27 July 2021 110.44.113.130talk 14,557 bytes−6 Attacks on MAC's like that on digital signatures are attempted forgery under chosen-message / known message attacks not chosen plaintext/ known plaintext attacksundo