As a result of the increased popularity of group-oriented applications and protocols, group communication occurs in many di erent settings: from network multicasting to application layer tele-and video-conferencing. Regardless of the application environment, security services are necessary to provide communication privacy and integrity. This paper considers the problem of key agreement in dynamic peer groups. (Key agreement, especially in a group setting, is the steeping stone for all other security services.) Dynamic peer groups require not only initial key agreement (IKA) but also auxiliary key agreement (AKA) operations such as member addition, member deletion and group fusion. We discuss all group key agreement operations and present a concrete protocol suite, CLIQUES, which o ers complete key agreement services. CLIQUES is based on multi-party extensions of the well-known Di e-Hellman key exchange method. The protocols are e cient and provably secure against passive adversaries.
In 2000, Steiner et al. REF proposed a key management scheme for dynamic peer groups based on the Diffie-Hellman key exchange scheme.
Key Agreement in Dynamic Peer Groups
IEEE Transactions on Parallel and Distributed Systems
Computer Science