中文摘要：

在Ad hoc网络中，报文转发依赖于各个分布节点间的协作。在分析了不同路由协议对信任模型的不同需求基础上，针对源路由协议特性，提出了鲁棒信任机制（RTM）。该机制基于OTMF模型，采用了基于确认机制从非邻接节点获取直接信息的方法，以及基于贝叶斯决策的推荐信任度修正方法，有效提高了信任评价的正确率。实验结果表明，RTM能较好地抵御针对信任模型的虚假推荐攻击并具有较快信任评价收敛速度。

英文摘要：

Packet delivery of Ad hoc networks depends on collaboration among distributed entities. Different needs on the trust models of varieties of routing protocols were analyzed separately. The robust trust mechanisms（RTM） were proposed to meet the new demands of source routing protocols for trust models. A new scheme for gathering first-hand trust information from non-neighbor nodes using acknowledgements was presented in paper. The RTM expands the OTMF by providing recommendation trust revision support, which is based on Bayesian Decision-Making theory and minimum-loss principle and promotes accuracy of trust value. Simulations show that compared with theOTMF, the RTM is helpful to reduce the impact of some threats on trust management and has better convergence.