Ad Hoc网络中基于簇的安全组播密钥协议

针对Ad Hoc网络中Joux协议不能抵抗主动攻击的问题,提出了一种基于簇的安全组播密钥协议.该协议采用基于身份的公钥密码体制,增加时间戳机制,同时不使用认证中心,对簇内成员进行身份认证.安全分析表明:该协议能够很好地抵抗Ad Hoc网络中的主动和被动攻击,安全地协商组密钥.性能分析表明:相对于使用认证中心的协议,减少了协议中包括通信轮数、通信次数、广播次数、消息总量等的通信开销,降低了协议中包括点乘、配对、指数运算的计算开销.

Secure Cluster-Based Group Key Protocol in Ad Hoc Networks

The Joux protocol isn't secure from active attack in Ad Hoc networks. A cluster-based private key protocol for secure multicast is therefore proposed to solve the problem, where an identity-based public key system with timestamp is applied to the authentication of any cluster members instead of CA (center of authentication). Security analysis showed that the protocol is highly secure against both the active and passive attacks in Ad Hoc networks and enables the group key consultation securely. Performance analysis showed that, in comparison with the application of CA, the protocol reduces the costs involved in communication rounds/frequency, radio frequency and total number of messages/computations(such as the operations of point multiplication, matching and exponentiation).