Replay Attack Resistance Sample Clauses
Replay Attack Resistance. There is a timestamp Ti in the signature generated by vehicle, which enables the RSU to check the freshness of Ti to prevent the replay of request for group key generation. Therefore, the proposed scheme can satisfy the replaying resistance.
Replay Attack Resistance. In the scheme, Di generated by the RSU is different from the secret keys of the vehicles, where a notably strong collision-resistant one-way function H is used. Therefore, the group key negotiated is highly independent. In addition, because of the difficulty of CDHP, it is not feasible for any attacker to calculate the secret keys in polynomial time.