自主群密钥更新模型研究

针对分布式网络群组密钥更新中非更新成员参与共享密钥计算增加交互延时问题,提出一种自主密钥更新模型,通过DH协议和多项式设计一种自主群组密钥管理方案,具有单加密密钥多解密密钥加密解密性质。更新过程中,更新成员本地自主更新公开加密密钥,无需在线KMC支持,保护非更新成员解密密钥的有效性,减少密钥更新延时和非更新成员的计算开销,具有自主密钥更新模型的性质,适用延时受限的无线网络场景。

An autonomic rekeying model for group key management

In group key management of distributed wireless networks, non update members take part in shared key calculation, which incurs much interactive time delay. To deal with the challenge, we present a novel autonomic rekeying model, and then an autonomic group key management is designed on basis of DH protocol and polynomial formula without support of online KMC, which meets the requirement of one encryption key multi decryption key. All non update members do not participate in rekeying for key joining/leaving operations, and the fresh public encryption keys cannot break the validity of secret decryption keys belonging to non update members. Therefore, the rekeying delay time of the proposed scheme is reduced efficiently, and it also has the properties of the autonomic rekeying model logically. In addition, the scheme is suitable for wireless networks whose time delay is limited strictly.