一种基于模糊理论的信任度评估模型

A trust values evaluation model based on the fuzzy theory

信任是信息安全的重要保证.针对主观信任评估的不确定性,提出了一种基于模糊理论的信任度评估模型,运用模糊理论给出了信任度的等级机制和综合评估机制.为体现权重的不确定性,考虑权值依据评估值动态变化,利用变权法实现了主观信任评估的权重分配.根据综合评估得到的可信值,评估信任模型的可信度.实例分析验证了基于模糊理论的主观信任评估方法的可信性、有效性和合理性.

Trust is an important guarantee for information security. According to the uncertainty of the subjective trust evaluation, a ＂Trust Values Evaluation Model＂ based on the fuzzy theory was proposed. Furthermore, the trust values level mechanism and comprehensive evaluation mechanism based on the fuzzy theory were given. Tak- ing into account the uncertainty of weight and the weights based on dynamic changes, and with the help of the vari- able weight method, the paper discussed the weight distribution of subjective trust evaluation. In terms of the credi- ble value of comprehensive evaluation, the credibility of the trust was evaluated. The exemplary analyses verified the reliability, validity and rationality of the subjective trust evaluation model based on the fuzzy theory.