微型机与应用
微型機與應用
미형궤여응용
MICROCOMPUTER & ITS APPLICATIONS
2012年
10期
81-84,88
,共5页
恶意节点%共谋攻击%P2P%电子商务%信任模型
噁意節點%共謀攻擊%P2P%電子商務%信任模型
악의절점%공모공격%P2P%전자상무%신임모형
malicious peer%collusion attack%peer-to-peer%E-commerce%trust model
针对现有P2P信任模型中交易因素考虑不全面、缺乏恶意节点识别机制而导致无法防御恶意节点共谋攻击和耗费网络带宽等问题,提出一种新的P2P信任模型EVTM,该模型采用向量化的方式表示评价的标准,引入时间衰减因子和惩罚机制,促使模型中交易节点积极地、正确地评价,从而构造一个诚信、可靠的交易环境。仿真实验进一步证明EVTM不仅可以根据用户的不同需求对交易对象做出更合理的信任评估,而且能有效地避免恶意节点的共谋攻击,从而降低交易的风险,减少损失。
針對現有P2P信任模型中交易因素攷慮不全麵、缺乏噁意節點識彆機製而導緻無法防禦噁意節點共謀攻擊和耗費網絡帶寬等問題,提齣一種新的P2P信任模型EVTM,該模型採用嚮量化的方式錶示評價的標準,引入時間衰減因子和懲罰機製,促使模型中交易節點積極地、正確地評價,從而構造一箇誠信、可靠的交易環境。倣真實驗進一步證明EVTM不僅可以根據用戶的不同需求對交易對象做齣更閤理的信任評估,而且能有效地避免噁意節點的共謀攻擊,從而降低交易的風險,減少損失。
침대현유P2P신임모형중교역인소고필불전면、결핍악의절점식별궤제이도치무법방어악의절점공모공격화모비망락대관등문제,제출일충신적P2P신임모형EVTM,해모형채용향양화적방식표시평개적표준,인입시간쇠감인자화징벌궤제,촉사모형중교역절점적겁지、정학지평개,종이구조일개성신、가고적교역배경。방진실험진일보증명EVTM불부가이근거용호적불동수구대교역대상주출경합리적신임평고,이차능유효지피면악의절점적공모공격,종이강저교역적풍험,감소손실。
As the problems of existing model, like waste avoid collusion attack by malicious peer, we proposed a novel bandwidth, many transaction faction not take into account and can＇t trust model named EVTM （Trust Model based on Evaluation Vector）, by improved and optimized based existing P2P trust model, introducing time attenuation factor and punishment mechanism to en- courage peer provide positive and correct evaluation, construct a reliable deal atmosphere. Through the simulation experiments proof the improvement and advantage of the model, not only make users to make a reasonable trust evaluation according to their different requirements for transaction object, and can effectively avoid collusion attack, which reduces the trade risk and reduce the loss.
