NDLI: How many eyes are spying on your shared folders?

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How many eyes are spying on your shared folders?

Content Provider	ACM Digital Library
Author	Zhang, Jianyu Zou, Wei Liu, Bingshuang Wei, Tao Liu, Zhaoyang
Abstract	Today peer-to-peer (P2P) file sharing networks help tens of millions of users to share contents on the Internet. However, users' private files in their shared folders might become accessible to everybody inadvertently. In this paper, we investigate this kind of user privacy exposures in Kad, one of the biggest P2P file sharing networks, and try to answer two questions: Q1. Whether and to what extent does this problem exist in current systems? Q2. Are attackers aware of this privacy vulnerability and are they abusing obtained private infortion? We build a monitoring system called Dragonfly based on the eclipse mechanism to passively monitor sharing and downloading events in Kad. We also use the Honeyfile approach to share forged private information to observe attackers' behaviors. Based on Dragonfly and Honeyfiles, we give affirmative answers to the above two questions. Within two weeks, more than five thousand private files related to ten sensitive keywords were shared by Kad users, and over half of them come from Italy and Spain. Within one month, each honey file was downloaded for about 40 times in average, and its inner password information was exploited for 25 times. These results show that this privacy problem has become a serious threat for P2P users. Finally, we design and implement Numen, a plug-in for eMule, which can effectively protect user private files from being shared without notice.
Starting Page	109
Ending Page	116
Page Count	8
File Format	PDF
ISBN	9781450316637
DOI	10.1145/2381966.2381982
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-10-15
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Privacy File-sharing Kad P2p
Content Type	Text
Resource Type	Article

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