LAUSR

Abstract More than two participants implement communication over the network at the same time, aiming to establish a common session key, and it is named group session communication. Nowadays, many researchers lay emphasis on achieve a perfect group key agreement protocol in order to resist various attacks and complete mutual authentication for every two-party among them. Actually, investigators have overlooked an important issue called insider attack, which the inner participants could disclose the source of the messages to outsider parties. Therefore, in this paper, we present a novel group key agreement protocol with deniable authentication to against insider attack. After achieve the process of deniable authentication, the group participants unable to reveal the source of the messages to another party because any subgroup participants still can simulate the whole transcript process. Meanwhile, our protocol based on chaotic maps algorithm, which enhance the calculation efficiency and realize the goal of privacy protection successful.