一种新的P2P安全信任管理模型

由于P2P网络的特性,传统的信任机制难以对其应用中存在的冒名,诋毁等安全问题,进行合理的解决。在现有信任模型的基础上提出了一个新的P2P安全信任管理模型,该模型负责节点信任度的评估、更新,信任度的评估方法不仅考虑了节点自身的交易历史,同时也考虑了其他节点的推荐,并且每次交易后,都要根据本次交易的情况,及时修改节点之间的个人交互度和推荐节点的推荐可信度,使信任度能正确地反映节点的信誉,能够有效地预防冒名、诋毁等现象。

A New P2P Security Trust Management Model

On account of characteristics of P2P network,traditional trust mechanisms are difficult to solve problems of model security,such as cheat attacks and slandering.This paper put forward a new trust model,Trust Management model is responsible for evaluating and modifying a peer s trustworthiness,which is composed of trust evaluation module,exchange evaluation module and trust modification module.The paper proposes a new flexible trust evaluation method which not only considers the exchange experience of self but also refers recommendations from other peers. And, when the exchange is finished, trust modification module will modify peer＇ s trustworthiness and evaluate peer＇ s reliability in providing recommendations about peers to make sure trustworthiness can reflect the reputation of peers exactly.