中文摘要：

随着移动AdHoc网络的迅速发展，网络的开放性、移动性以及路由的脆弱性等特点日益突出，路由的安全性问题愈发重要．本文提出了一种基于按需路由的安全多路径DSR协议（SeMDSR），并阐述了该协议的框架及其工作原理．仿真结果表明，该协议可以有效的防止伪装、篡改、路由黑洞、路由重播和拒绝服务（DoS）等攻击；同时，本文提出的多路径路由选择算法，可缓解由于恶意节点拒绝服务或网络环境变化而引发的路由再发现问题．

英文摘要：

With the rapid growth of mobile Ad hoe networks, routing security has become an important issue due to the openness, mobility, dynamic topology and routing vulnerability of networks. This paper proposes an on-demand secure multi-path DSR protocol （SeMDSR） and specify its framework and principle. Simulation result shows that the new protocol can alleviate some major security problems （i. e. fabrication, modification, routing black-hole attack, routing replay attack） with routing in mobile Ad hoe networks. A multi-path selection algorithm is proposed to alleviate routing rediscovery brought by DoS problem caused by evil nodes or by network environment changes.