An Enhancement of Authentication Protocol and Key Agreement (AKA) For 3G Mobile Networks

This paper proposes a secure authentication mechanism by integrating the public key with thehash-chaining technique. The propose protocol satisfies the security requirements of thirdgeneration (3G) mobile networks. Also provide the protection of the international mobilesubscriber identity (IMSI) to ensure subscriber un-traceability, key refreshment periodically,strong key management and a new non-repudiation service in a simple and elegant way. Theproposed protocol is more secure protocol than the other available authentication protocols. Toavoid the complicated synchronization as in universal mobile telecommunications system (UMTS)the proposed protocol does not use sequence number (SEQ), the management of a hash chain issimple and elegant compared to that of SEQ. This proposed protocol is secure against networkattacks, such as replay attacks, guessing attacks, and other attacks.