International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
In this paper, the authors proposed an Authenticated Asymmetric Group Key Agreement (A2GKA) protocol using bilinear mapping for dynamic networks. This protocol is mostly suitable for multicasting (or broadcasting) system without relying on the group controller to distribute secret keys to the group members. Their proposed protocol is equipped with various security issues including perfect forward security. Also, they revised the group key agreement definition and distinguished the symmetric key agreement from AGKA protocol. The protocol A2GKA enables the group members to negotiate a common encryption key which is accessible to the public, by holding their secret decryption key. Conventional AGKA is secured against passive attacks only, whereas their proposed one is impregnable against both active as well as passive attacks.