关键词: 群组密钥管理, 密钥更新模型, 自主, 更新延时

Abstract:

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.

Key words: group key management;rekeying model;autonomy;rekeying time delay