Novel group key agreement protocol for dynamic collaborative peer groups

To achieve security in a dynamic collaborative peer group,group key agreement protocol should be provided.Two-party key agreement protocol based on the weil pairing protocol(A-WGKA2) was proposed in this paper.It may establish a secret key between two nodes and authenticate each other by fewer messages.The proposed protocol has the security properties such as forward secrecy,no unknown key-share,known session key security,no key control and no key-compromise impersonation.Further,we proposed a group key agreement protocol using weil pairing referred as A-WGKAn that was adapted to the dynamic collaborative peer groups.In the A-WGKAn protocol,the A-WGKA2 protocol was employed on key tree to establish and allocate group key.Therefore,it not only has low computational overhead and communication costs but also provides the node authentication.