A Secure, Green and Optimized Authentication and Key Agreement Protocol for IMS Network

Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 746)


IP multimedia subsystem (IMS) is a prominent architectural framework for multimedia services delivery in 4G/5G networks. Authentication is a critical security mechanism which accords authorized users access to these services. As defined by 3rd Generation Partnership Projects (3GPP), IMS- Authentication and Key Agreement protocol (IMS-AKA) is the official authentication procedure in IMS. However, the procedure is prone to different weaknesses both on security (disclosure of identities) and performances (complexity) aspects. This paper proposes an IMS-AKA+ protocol that addresses effectively user’s identities protection by using a key-less cryptography. Furthermore, the proposed algorithm significantly reduces the authentication process complexity due to the use of Elliptic Curve Cryptography (ECC). Simulations were carried out for the IMS-AKA+ protocol and the original IMS-AKA protocol. The results showed that using IMS-AKA+ reduces of up to 28% authentication time is possible, and a saving of 53% of the storage space occurs with an increased security and less energy.


SIP AKA IMS IMS-AKA ECC Authentication Performance 


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© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Laboratoire de la Communication dans les Systèmes Informatiques (LCSI)Ecole Nationale Supérieure d’InformatiqueAlgiersAlgeria

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