Smart-blacklisting:P2P文件共享系统假块污染攻击对抗方法

doi:10.3969/j.issn.1000-436x.2013.08.012

通信学报 ›› 2013, Vol. 34 ›› Issue (8): 88-94.doi: 10.3969/j.issn.1000-436x.2013.08.012

Smart-blacklisting:P2P文件共享系统假块污染攻击对抗方法

姚汝颢¹,刘丙双¹,曲德帅²,周渊²,韩心慧¹

¹ 北京大学计算机科学技术研究所互联网安全技术北京市重点实验室，北京100080
² 国家计算机网络应急技术处理协调中心，北京100029

出版日期:2013-08-25 发布日期:2017-08-31
基金资助:
国家自然科学基金资助项目

Smart-blacklisting:an efficient methodology for mitigating fake block attack in P2P file-sharing systems

Ru-hao YAO¹,Bing-shuang LIU¹,De-shuai QU²,Yuan ZHOU²,Xin-hui HAN¹

¹ Beijing Key Laboratory of Internet Security Technology,Institute of Computer Science and Technology,Peking University,Beijing 100080,China
² National Computer Network Emergency Response Technical Team/Coordination Center of China,Beijing 100029,China

Online:2013-08-25 Published:2017-08-31
Supported by:
The National Natural Science Foundation of China

摘要/Abstract

摘要：

在当前十分流行的P2P文件共享网络中，假块污染攻击严重地干扰了正常的文件下载过程。提出了基于概率统计及多轮筛选的对抗假块污染攻击策略——Smart-blacklisting，从理论上证明了该策略的有效性。仿真实验结果表明，该策略可以保证目标文件成功下载并降低假块污染攻击对下载时间及带宽消耗的影响。当攻击强度为0.2时，下载时间仅为eMule系统黑名单方法的13%，在带宽消耗方面也仅为其50%。

关键词: P2P文件共享系统, eMule, BitTorrent, 假块污染攻击

Abstract:

Fake block attack intends to prolong the downloading time by providing fake data to make the file block fail in the hash check.P2P file-sharing systems are susceptible to fake block attacks,whereby malicious clients are able to make a big impact on users’ downloading experience.An efficient methodology named Smart-blacklisting,which aims to lessen the downloading time and bandwidth wastes interfered by the attack was proposed through using a mathematic model,and the efficiency of this method was analyzed during a simulation experiment.The ovel approach presents 87% downloading time and 50% bandwidth wastes compare less than those of eMule blacklisting method.

Key words: P2P file-sharing system, eMule, BitTorrent, fake block attack

姚汝颢,刘丙双,曲德帅,周渊,韩心慧. Smart-blacklisting:P2P文件共享系统假块污染攻击对抗方法[J]. 通信学报, 2013, 34(8): 88-94.

Ru-hao YAO,Bing-shuang LIU,De-shuai QU,Yuan ZHOU,Xin-hui HAN. Smart-blacklisting:an efficient methodology for mitigating fake block attack in P2P file-sharing systems[J]. Journal on Communications, 2013, 34(8): 88-94.

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符号	含义
N	正常上传节点数
M	假块污染攻击节点数
pw	下载并行度
P_succeed	P(单次下载成功)
P_fail	P(单次下载失败)
P_x-attacknode	P(x个攻击节点│单次下载失败)
E_ar-df	E(攻击节点率│单次下载失败)
E_ar	E(单次下载包含攻击节点率)
E_rt-sb	E(Smart-blacklisting重试下载次数)
E_rt-eMule	E(eMule重试下载次数)

参数名	参数值
正常上传节点数	N=100
假块污染攻击节点数	M
攻击节点判定阈值	T
攻击强度	M/N
节点并行度	pw=20
下载文件块数	partFileNum=100
单个partFile包含的block数	53（与eMule系统一致）
单个block大小	blockSize=180 KB
文件大小	954 MB

Smart-blacklisting:P2P文件共享系统假块污染攻击对抗方法

Smart-blacklisting:an efficient methodology for mitigating fake block attack in P2P file-sharing systems

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