A Trust Model Based on the Multinomial Subjective Logic for P2P Network

• 作者: Chao Li Junfeng TIAN Rui TIAN Xuemin HE
• 来源期刊: 通讯、网络与系统学国际期刊(英文)
• 学科: 数学
• 关键词: TRUST MULTINOMIAL SUBJECTIVE Logic REPUTATION Risk DIRICHLET Distribution
• 年，卷（期）: 2009,（6）
• 页码范围: 546-554
• 页数: 9页
• 分类号: O1

摘要

In order to deal with the problems in P2P systems such as unreliability of the Service, security risk and attacks caused by malicious peers, a novel trust model MSL-TM based on the Multinomial Subjective Logic is proposed. The model uses multinomial ratings and Dirichlet distribution to compute the expectation of the subjective opinion and accordingly draws the peer’s reputation value and risk value, and finally gets the trust value. The decay of time, rating credibility and the risk value are introduced to reflect the recent behaviors of the peers and make the system more sensitive to malicious acts. Finally, the effectiveness and feasibility of the model is illustrated by the simulation experiment designed with peersim.