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A Certificateless Group Authenticated Key Agreement Protocol Based on Dynamic Binary Tree

Traditional ciphertext encryption scheme easily leaks individual data privacy information. Therefore, this paper proposes a certificateless group authenticated key agreement protocol based on dynamic binary tree. Group authentication key negotiation protocol enables multiple participants to establish a session key in an open channel. In order to provide key authentication and reduce the cost, the binary tree is introduced into the group key agreement. Due to certificateless mechanism, it simplifies the complex certificate management problem in the protocol based on certificate. And it also solves the key escrow problem based on the identity. In addition, the new protocol has made rigorously formalized proof and a comparison of calculation horizontally. The results show that the new protocol is safe and efficient.