CAJ | 학술논문

　　移动Ad Hoc网由于没有固定基础设施，使得网络节点间的信任问题变得日益突出。针对已有信任评估模型在证据收集和信任融合方面的不足，提出了一个多维证据融合信任评估模型。通过拓展Watchdog机制，检测节点对包的各种历史处理行为，来扩宽直接信任证据收集的维度；同时使用Beta分布下的贝叶斯统计方法，计算每种行为的可信度，之后通过证据合成规则来融合多种行为，以提高信任评估的准确性。通过仿真实验，验证了该模型的有效性；分析表明，模型中使用信息贴近度量化推荐权重，降低了恶意推荐带来的影响，保证了信任评估的健壮性。
　　이동Ad Hoc망유우몰유고정기출설시，사득망락절점간적신임문제변득일익돌출。침대이유신임평고모형재증거수집화신임융합방면적불족，제출료일개다유증거융합신임평고모형。통과탁전Watchdog궤제，검측절점대포적각충역사처리행위，래확관직접신임증거수집적유도；동시사용Beta분포하적패협사통계방법，계산매충행위적가신도，지후통과증거합성규칙래융합다충행위，이제고신임평고적준학성。통과방진실험，험증료해모형적유효성；분석표명，모형중사용신식첩근도양화추천권중，강저료악의추천대래적영향，보증료신임평고적건장성。
In the mobile Ad Hoc network, there is no infrastructure, so that the trust evaluation is more and more significant. In the existing model of trust evaluation, there are some defects on evidence collection and integration. A trust evaluation model of multidimensional evidence fusion is proposed. It detects the various historical behavior of nodes through the expanding Watch-dog to widen the dimension of direct evidence collecting. Each behavior is calculated by using Bayesian method which meets the Beta distribution. Through the credibility method, all behaviors are merged together to improve the accuracy of assessment of the trust. The simulation results demonstrate the effectiveness of this model. Analysis shows that recommended weight is quantitatively evaluated by information similarity measure, reducing the impact of malicious recommendation, ensuring the trust assessment robustness.