Session key agreement scheme for Ad Hoc network based on identity authentication

To build a safe and credible session key,a new session key agreement scheme based on identity authentication and combined with enter restriction scheme was proposed.Firstly,the improved alternation identity-based authentication that combines with system private key and hash function was proposed for the safety of system private key.It guarantees node to communicate with the right one and avoids complicated management problem that may be caused by public key certificate.At the same time,the scheme has forward secrecy and anti-attack performance of intermediaries.Secondly,enter restriction scheme,which updates key share to strengthen the security of private key,and avoids single node's invalidation in Ad Hoc network.Finally,the correctness,security and performance were analyzed.The result shows that the scheme saves network resources and has high security and reliability.