Scheme of re-keying management in real-time distributed group communication

A scheme of re-keying management based on key chain and BD protocol applied to real-time distributed communication is proposed.The scheme sets up a key management model supervised by seed nodes,in which refreshing key mainly occurs locally so that it would not result in the situation of large-scaly exchanging information.The time cost of refreshing key was reduced because of BD protocol reducing the time cost of creating key-chain's seed parameter.Under the analysis of security,robustness and efficiency,the scheme can guarantees forward and backward confidentiality yet still achieves the real-time property.Compared with Iolus model,the proposed scheme resolves the 1 to N problem due to single node failure and avoids data bottleneck occurring at GSI.