Provably Secure Key Management Protocol for Heterogeneous WSN

Authentication and key agreement protocol is the mainstream method to solve the secure communication of devices in wireless sensor networks.For the current mainstream secret key agreement protocol in wireless sensor networks, the scenario considered is authentication and agreement between peer nodes, which has the problems of high computation and low communication efficiency.To solve the above problems, this paper proposes an authentication and secret key management protocol suitable for heterogeneous wireless sensor networks.Both communication terminal nodes（L node） first establish the session secret key with the management node（H node） of their respective cluster.If they fail to pass the identity authentication, the L node will be denied access to the network, which solves the problem that most protocols lack to deal with denial of service attacks.Then, with the help of the H node through which the communication path passes, the session key agreement information is forwarded to complete the end-to-end sessi