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为了提高群组通信中密钥管理协议的安全性和执行效率,分析了群组密钥中集中式密钥管理和分布式密钥管理,针对这两类协议的优势和不足,构造了一种群组密钥管理协议,此协议保留了集中式密钥管理中群组服务器,并融入了分布式管理协议的特点,吸取了两者的优点.最后我们对该协议的安全性和有效性进行了分析.结果表明,在安全性得到保证的前提下显著地提高了协议的执行效率.
In order to improve the security and execution efficiency of the key management protocol in group communication, the centralized key management and distributed key management in group key are analyzed. According to the advantages and disadvantages of these two kinds of protocols, a kind of Group key management protocol, this protocol retains the centralized key management group server, and incorporates the characteristics of distributed management protocol, draw on the advantages of both.Finally, we deal with the security and effectiveness of the protocol The results show that under the precondition that the security is guaranteed, the execution efficiency of the protocol is significantly improved.