开放网络中基于担保的主观信任模型

Subjective Trust Model Based on Assurance in Open Networks

针对目前存在的主观信任模型不能很好地解决信任初始值的设定和实体匿名问题,利用主观逻辑理论对实体的信任关系进行建模,提出了一种开放网络中的新型主观信任模型,定义了担保信任和全局信誉,依靠实体之间的担保关系设定信任初始值,给出了推荐信任和担保信任的搜索算法。模型有效地描述了实体间主观信任关系,保证了实体的匿名性和信任消息的完整性,从而防止了针对欺骗和联合欺骗。通过仿真实验证明了模型的有效性。

In open networks, the existing subjective trust models can not solve the issues of setting initial value of trust and assuring anonymity. Base on subjective logic theory, this paper presents a new subjective trust model. The models define the assurance trust and global reputation; according to the assurance relationship in the entities, it sets initial value of trust; and an algorithm of searching the recommendation trust and assurance trust is given. The model describes the trust relationship effectively, assures the anonymity of entities and the secrecy and integrity of trust value, and prevents aiming cheat and combining cheat. According to the experimental results, the model is effective.