Resilient group key agreement protocol with authentication security

Many applications in Dynamic Peer Group are becoming increasing popular nowadays. There is a need for security services to provide group-oriented communication privacy and data integrity. To provide this form of group communication privacy, it is important that members of the group can establish a common secret key for encrypting group communication data. A secure distributed group key agreement and authentication protocol is required to handle this issue. Instead of performing individual re-keying operations, an interval-based approach of re-keying is adopted in the proposed scheme. The proposed interval based algorithms considered in this paper are Batch algorithm and the Queue-batch algorithm. The interval-based approach provides re-keying efficiency for dynamic peer groups while preserving both distributed and contributory properties. Performance of these interval-based algorithms under different settings, such as different join and leave probabilities, is analyzed The Queue-batch algorithm performs the best among the interval-based algorithms.