一种改进的公钥证书抗攻击信任度模型

Improved attack-resist trust metric model for public key certification

由信任的相关概念及信任特性入手,阐述了信任度提出的原因,介绍了几种信任度模型,分析了各模型的特点和共性。重点对Levien信任度模型进行了研究,分析了其存在的缺陷,并从攻击者角度提出一种改进的节点信任度模型。新模型基于Levien信任度模型结构特点,根据计算攻击者的攻击能力参数,引入信任传递衰减因数,综合度量每一节点的信任度,分析得出提高信任度的途径。

From the concept of trust and confidence related characteristics, the reason of raising the trust metric was introduced. Several trust metric models were recommended, and their characteristics and commonness were analyzed. The study focused on the Levien trust metric model and its shortcomings, and a modified node trust metric model was proposed from the perspective of the attacker. The new model, based on the structure of Levln＇s model, is used for computing attackers＇ capacities for a successful attack. It imports a descending factor of trust transmission to measure the trust metric of each node synthetically, and gives a better way to improve trust metrics through analysis.