CAJ | 학술논문

Ad-Hoc网络拓扑的变化或无线冲突的发生，用于信任评估的证据抽样空间可能会不完全或不可靠，从而影响信任评估有效性。本文利用Dempster-Shafer(D-S)证据理论构造信任评估模型，可以在不需要先验分布的情况下同时处理信任评估中的随机性和主观不确定性。该模型同时具有推荐信任过滤机制，能够实时监测推荐节点行为，及时发现并隔离恶意推荐节点和共谋攻击节点。理论分析和仿真结果表明所建模型为信任不确定性的表达和处理提供有效的方法，同时可以有效抵御攻击，减少恶意推荐和共谋攻击对信任评估的影响。
Ad-Hoc망락탁복적변화혹무선충돌적발생，용우신임평고적증거추양공간가능회불완전혹불가고，종이영향신임평고유효성。본문이용Dempster-Shafer(D-S)증거이론구조신임평고모형，가이재불수요선험분포적정황하동시처리신임평고중적수궤성화주관불학정성。해모형동시구유추천신임과려궤제，능구실시감측추천절점행위，급시발현병격리악의추천절점화공모공격절점。이론분석화방진결과표명소건모형위신임불학정성적표체화처리제공유효적방법，동시가이유효저어공격，감소악의추천화공모공격대신임평고적영향。
Due to changes in network topology and wireless conlficts, the evidence of trust sampling space may be incomplete or unreliable, thus affecting the trust evaluation validity. In this paper Dempster-Shafer (D-S) evidence theory is used to establish trust evaluation model which can deal with both trust randomicity and subjective uncertainty without prior distribution in evaluation. It also has the recommendation trust ifltering mechanism which can monitor the node’s behavior in real 0time, detect and isolate malicious node timely. Theoretical analysis and simulation results show that the proposed model provide an effective method to the trust uncertainty expression and processing, and can effectively resist the attack and reduce the impact of malicious node.