山东大学学报(理学版)
山東大學學報(理學版)
산동대학학보(이학판)
JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE)
2014年
9期
97-102,108
,共7页
彭浩%赵丹丹%韩建民%鲁剑锋
彭浩%趙丹丹%韓建民%魯劍鋒
팽호%조단단%한건민%로검봉
P2P%传递模式%全局信誉值%本地信誉值
P2P%傳遞模式%全跼信譽值%本地信譽值
P2P%전체모식%전국신예치%본지신예치
P2P (peer-to-peer)%transitive mode%global reputation value%local reputation value
P2 P系统中的节点具有随机性和动态性,如何建立节点间的信任关系,是亟需解决的难点和关键性问题。目前P2 P系统中主要采用传递模式算法计算节点的信誉值,分析了该算法存在的信誉值评估结果失真的问题,并对算法进行了优化。实验结果表明,信誉评估的优化算法得出的信誉值更加接近理想值,从而提高了P2 P系统对恶意节点的识别能力。
P2 P繫統中的節點具有隨機性和動態性,如何建立節點間的信任關繫,是亟需解決的難點和關鍵性問題。目前P2 P繫統中主要採用傳遞模式算法計算節點的信譽值,分析瞭該算法存在的信譽值評估結果失真的問題,併對算法進行瞭優化。實驗結果錶明,信譽評估的優化算法得齣的信譽值更加接近理想值,從而提高瞭P2 P繫統對噁意節點的識彆能力。
P2 P계통중적절점구유수궤성화동태성,여하건립절점간적신임관계,시극수해결적난점화관건성문제。목전P2 P계통중주요채용전체모식산법계산절점적신예치,분석료해산법존재적신예치평고결과실진적문제,병대산법진행료우화。실험결과표명,신예평고적우화산법득출적신예치경가접근이상치,종이제고료P2 P계통대악의절점적식별능력。
In P2P(Peer-to-Peer)system,peers present the characteristics of random and dynamic,and then how to es-tablish a trust relationship between peers is a difficult and key problem that is urgent to solve.At present,the algorithm of reputation computing based on transitive mode is used in P2P system.In this paper,this algorithm was optimized based on analyzing its distortion problem of reputation assessing value.The simulation results show that the reputation assessing value of the optimized algorithm is closer to the ideal value.In this way,the discovery ability of malicious peers is enhanced at the same time.