A Group Key Agreement With Efficient Communication for Ad Hoc Networks

摘要

In distributed ad hoc sensor networks, scalable group key agreement protocol plays an important role. They are designed to provide a group of users with a shared secret key such that the users can securely communicate with each other over a public network. In most of previous group key agreement protocols, the number of messages sent by all users increases with the number of all participants. In this paper, a dynamic authenticated group key agreement protocol is presented using pairing for ad hoc networks. In Join algorithm, the number of transmitted messages does not increase with the number of all group members, which makes the protocol more practical. The protocol is provably secure. Its security is proved under Decisional Bilinear Diffie-Hellman assumption. The protocol also provides many other security attributes.