CAJ | 학술논문

移动自组织网络(MANETs)中,移动节点具有匿名性和高度自治的特点;并且由于缺乏对与之交互的节点的可信程度的知识,节点需应对交互过程中可能出现的威胁.另外,网络拓扑结构的改变或无线冲突的发生都可能导致作为信任值评估证据的样本空间不一定完整和可靠,使得现有的信任评估模型不太适用.提出了一种基于置信度的MANETs环境下的主观信任管理模型(CFSTrust),用于量化和评估节点的可信程度;给出了模型的数学表述和实现方法.运用模糊似然度和置信度对信任管理问题进行了建模,给出信任的评价机制,并提出了推荐信任关系的推导规则,构造了一个完整的主观信任管理模型.分析及仿真实验结果表明,CFSTrust模型较已有的基于证据理论的信任评估模型(TrustNet)更为有效,并为MANETs环境中的信任管理研究提供了一个有价值的新思路.
이동자조직망락(MANETs)중,이동절점구유닉명성화고도자치적특점;병차유우결핍대여지교호적절점적가신정도적지식,절점수응대교호과정중가능출현적위협.령외,망락탁복결구적개변혹무선충돌적발생도가능도치작위신임치평고증거적양본공간불일정완정화가고,사득현유적신임평고모형불태괄용.제출료일충기우치신도적MANETs배경하적주관신임관리모형(CFSTrust),용우양화화평고절점적가신정도;급출료모형적수학표술화실현방법.운용모호사연도화치신도대신임관리문제진행료건모,급출신임적평개궤제,병제출료추천신임관계적추도규칙,구조료일개완정적주관신임관리모형.분석급방진실험결과표명,CFSTrust모형교이유적기우증거이론적신임평고모형(TrustNet)경위유효,병위MANETs배경중적신임관리연구제공료일개유개치적신사로.
In mobile Ad-hoc networks (MANETs),due to their anonymous and self-organization nature mobile nodes have to manage the risks involved in the transactions without prior knowledge about each other's reputation.The sample space of evidence may be not integrative or reliable because of the change of network topology or the occurrence of wireless collision,so the existing trust evaluation models can't be applied.To solve the problem of trust evaluation and establish the trust relationship between nodes,CFSTrust,a subjective trust management model,is proposed to quantify and evaluate the trustworthiness of nodes.Its mathematical description and implementation are also given.The fuzzy-similarity and certainty-factor are used to model the issues of trust management.The evaluation of subjective trust is discussed,the derivation rules of recommendation trust relationships in MANETs are presented and a subjective trust management model is provided.Theoretical analyses and experimental results show the model is more effective compared with the trust model based on evidence-evaluation (TrustNet).The formal model proposed provides a new valuable way for MANETs environments.