[Cryptography] Non-deterministic PRF as a MAC-and-Nonce for AEAD?

[Alfie John]

Hi everyone,

Quick question on if this would work as a safe AEAD scheme:

  If you use a non-deterministic PRF instead of a MAC when doing
	MAC-then-Encrypt, could the NDPRF be safely used as the nonce (or
	used to deterministically generate a nonce) to the cipher as it
	should never be repeated given the same plaintext?

Alfie

-- 
Alfie John
https://www.alfie.wtf