Replay Attack. The proposed scheme is secure against the replay attack due to the changeable session keys: SK = SKA = SKB = e(QA, QB )K(XA+XB)xAxBP. The session key derived from the hash value of the temporary identities and the public keys. The temporary identity GUTI is changeable according to the user’s loca- tion area, and hence when the attacker replays with the previous security parameters, then the request will be re- jected because the users UE’s will know that this request is invalid.
Appears in 2 contracts
Sources: User to User Mutual Authentication and Key Agreement Scheme, User to User Mutual Authentication and Key Agreement Scheme