一种贡献型的动态群密钥交换协议

A contributory dynamic group key exchange protocol

利用DH(diffie hellman)问题、数字签名和哈希函数的内容,提出一种贡献型的动态群密钥交换协议,并对协议的安全性和计算效率进行了分析.所提出的协议中,每个群成员都贡献信息而生成会话密钥,协议能实现群成员的加入或离开.安全性分析表明,所提出的协议是安全的,能满足群密钥交换协议的安全性要求.协议效率比较分析表明所提协议的存储量和计算量都较小.

Using the content of DH （diffie hellman） problem, digit signature and hash function, a contributory dynamic group key exchange protocol was proposed, security and computation efficiency of the proposed protocol were analyzed. In the proposed protocol, each group participant could contribute information to the group to establish a session key and could join in or leave. The security analysis showed that the proposed protocol was secure and could satisfy the security requirement of group key exchange protocol. Comparative analysis of computation efficiency showed that storage load and computation load were lower than other protocols.