The research of hierarchical group key management for ad hoc networks

In the ad hoc networks, group key management is one of the most important secure problems. We propose a hierarchical group key management scheme adapted to large groups according to network characteristics. The scheme put STR hierarchical tree structure into distributed sub-group management model effectively, and combine layer-based key management with cycle-based key management, in order to reduce the communication and computation cost greatly, and is of good attribute in expansibility and lange ad hoc networks.