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中文摘要：
作为对基于密码体系的安全手段的重要补充，信任管理对移动自组网的可靠运行和安全保障具有重要意义。由于节点间信任关系的建立有赖于第三方节点的推荐信息，节点的虚假推荐和不推荐行为是信任管理机制必须解决的问题。以移动自组网中信任管理为研究背景，提出一种基于推荐的信任模型，引入时间帧进行信任值合成计算，用推荐信任度来评价节点的推荐行为，可以有效解决恶意节点和自私节点的虚假推荐行为，以及自私节点的不推荐行为，同时提高了信任模型的动态适应能力。理论分析和仿真结果进一步验证了模型的合理性和可行性。
英文摘要：
As an important supplement to cryptography based security solutions, trust management plays an important role in security and reliability of mobile ad hoc networks. However it can be cheated by the propagation of rumor produced by malicious or selfish node for using second- hand observation. Taking trust management as the background in mobile ad hoc networks, present a trust model based on recommendation mechanisms, provide a concrete and reasonable formula of trust value by the use of time- frame, and evaluate the recommender＇s feedback by the recommendation trust value. Our reputation mechanism shows effectiveness in distinguishing false recommendation of malicious and selfish node, and no- recommendation of selfish node, and it can evaluate the trust relationships between nodes more precisely. Through the theoretical analysis and simulated experiments, the rationality and the feasibility of this trust model is further confirmed.
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