计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2009年
33期
99-102
,共4页
主观逻辑%加权平均%声誉%风险
主觀邏輯%加權平均%聲譽%風險
주관라집%가권평균%성예%풍험
subjective logic%weighted average%reputation%risk
由于P2P系统的开放性、匿名性等特征,使得P2P系统对节点实体缺乏有效的管理机制,节点间的信任度无法进行有效的评定,就有可能存在欺诈节点,影响系统的可靠性,针对以上问题,在Jφsang主观逻辑理论的基础上,建立了一种基于主观逻辑理论的网络信任模型,该模型通过加权平均和方差来确定信任程度的取值方式,以及不确定度的可靠成分的确定,并在信任模型的基础上添加了风险机制,可以在一定程度上防止协同作弊和诋毁的安全隐患.通过仿真分析表明,这种信任模型能很好地解决P2P网络中存在的安全隐惠.
由于P2P繫統的開放性、匿名性等特徵,使得P2P繫統對節點實體缺乏有效的管理機製,節點間的信任度無法進行有效的評定,就有可能存在欺詐節點,影響繫統的可靠性,針對以上問題,在Jφsang主觀邏輯理論的基礎上,建立瞭一種基于主觀邏輯理論的網絡信任模型,該模型通過加權平均和方差來確定信任程度的取值方式,以及不確定度的可靠成分的確定,併在信任模型的基礎上添加瞭風險機製,可以在一定程度上防止協同作弊和詆燬的安全隱患.通過倣真分析錶明,這種信任模型能很好地解決P2P網絡中存在的安全隱惠.
유우P2P계통적개방성、닉명성등특정,사득P2P계통대절점실체결핍유효적관리궤제,절점간적신임도무법진행유효적평정,취유가능존재기사절점,영향계통적가고성,침대이상문제,재Jφsang주관라집이론적기출상,건립료일충기우주관라집이론적망락신임모형,해모형통과가권평균화방차래학정신임정도적취치방식,이급불학정도적가고성분적학정,병재신임모형적기출상첨가료풍험궤제,가이재일정정도상방지협동작폐화저훼적안전은환.통과방진분석표명,저충신임모형능흔호지해결P2P망락중존재적안전은혜.
P2P system lacks effective mechanism in terms of peers because of its open nature and user anonymity,so its peer trust cannot be evaluated efficiently,and then reliability of the system will be influenced by the possible cheating peers.Aiming at the security problems,a network trust model based on subjective logic theory(created by Jφsang) can be a better solution.The mod-el is to confirm appropriate value of trust degree and the trustiness proportion among the uncertainty by calculating its weighed average and variance.What's more,risk mechanism is introduced on the basis of the trust medel.With the help of all the processes, the trust model can prevent from collaborative cheating and imputation to some degree.According to the simulation analysis,it turns out to be that the trust model is effective to solve the security risk existing in P2P network.
