Game G4 definition
Examples of Game G4 in a sentence
Since p | q, generating b from U (R5×1) instead of U (R5×1) makes the advantage of the adversary in Game G4−′at least as big as in game G3, as the adversary in Game G4 can easily calculate the same value for c as in Game G3.
In game G4, since Ri is uniform at random in2 3 c s Game G4 (Randomize Credentials).
Since p | q, generating b from U (Rl×1) instead of U (Rl×1) makes the advantage of the adversary in Game G4−jat least as big as in game G3, as the adversary in Game G4 can easily calculate the same value for c as in Game G3.
We assume that is an attacker that breaks the AKE security game with a different advantage in Game G5 than in Game G4, then we construct an adversary ' which is able to distinguish triples coming from either a DDH or a random distribution: at the beginning of the experiment, ' receives a triple (X, Y, Z) which is a DDH triple if b = 0 or a random triple if b = 1.
Since the languages are not satisfied, the perfect smoothness guarantees perfect indistinguishability: AdvG3 (A) = AdvG2 ( ).Game G4: We now modify the way Execute-queries between two incompatible users are an-swered: we replace both session keys KC = ProjHash(hpS, LAC , cC, rC) × Hash(hkC, LAS , cS)πC πS,CπCπS,CKS = Hash(hkS, LAC , cC) × ProjHash(hpC, LAC , cS, rS)(for the client and the server) by two independent truly random values.
Since p | q, generating b from U (R5×1) instead of U (R5×1) makes the advantage of the adversary in Game G4−at least as big as in game G3, as the adversary in Game G4 can easily calculate the same value for c as in Game G3.
In practice, the experience of China's reform shows that any institutional reform can’t go against national interests, which constitutes a bottom line in institutional reform [4].
Game G4: We define the game G4 as the game G3, but we encaps K1 instead of K0: Encaps(EK, Reg, S∗):2.
As a result, Pr [γ2] = Pr [γ3] .Game G4 : It is the same as G3, except that bi = Ui + Encode (Ri) and b = U + Encode (R)now is changed back to bi = Aiw + ei + Encode (Ri) + Aiδi and b = Aw + e + Enc (R).
Since the computation is only rearranged, Pr[G3 = 1] = Pr[G2 = 1].Game 4: Game G4 is the same except that y values are$now drawn randomly from Z∗.