Abstract: Because of dynamic topology and the multi-hop of data transmission in Ad hoc networks，traditional routing protocol can’t ensure the routing security of Ad hoc networks.In this paper，a two-tier authentication security Ad hoc network routing protocol-TASRP（Two-tier Authentication Secure Ad hoc Routing Protocol） is proposed.In the process of establishment of on-demanding routing，introducing a two-tier authentication（identity authentication of neighbor nodes and mutual authentication while intermediate nodes processing the routing request packets） and exchanging one-time session key，it ensures the secure establishment of node-disjoint route，and it realizes the security of data transfers from end to end，ensuring the secure running of whole network.At the end of this paper，the security of the protocol is reasoned and analyzed by BAN logic，the analysis shows that the routing protocol has high security.

Key words: Ad hoc network, security routing protocol, authentication, key exchange, BAN logic

摘要： 由于Ad hoc网络拓扑的动态性和数据传输的多跳性，传统路由协议不能保证Ad hoc网络路由安全。提出一种双重认证Ad hoc网络安全多径路由协议——TASRP（Two-tier Authentication Secure Multi-path Ad hoc Routing Protocol），在按需路由建立的过程中，引入了双重认证（邻节点之间的身份认证、中间节点处理路由请求包时的相互认证）机制，同时实现了一次性会话密钥的交换，既保证了节点分离路径的安全建立，又实现了端到端的数据安全传输，保证了整个网络运行的安全。最后运用BAN逻辑进行推理分析，分析表明，该路由协议具有高的安全性。

关键词: Ad hoc网络, 安全路由协议, 认证, 密钥交换, BAN逻辑