Definition isPRF {D R Key:Set} (RndKey:Comp Key) (RndR: Comp R) (f: Key -> D -> R)
                         (ED:EqDec D) (ER:EqDec R) advantage adversary :=
        PRF_Advantage RndKey RndR f _ _ adversary <= advantage.

Lemma wrappedSAP_1_1_local (msg1 msg2 : HMAC_Abstract.Message PARS.P): HMAC_Abstract.wrappedSAP _ _ EQ.splitAndPad_v msg1 = HMAC_Abstract.wrappedSAP _ _ EQ.splitAndPad_v msg2 -> msg1 = msg2.