Providing Witness Anonymity Under Peer to peer setting精选.pdfVIP

324 IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY, VOL. 5, NO. 2, JUNE 2010 Providing Witness Anonymity Under Peer-to-Peer Settings Bo Zhu, Member, IEEE, Sanjeev Setia, Sushil Jajodia, Senior Member, IEEE, and Lingyu Wang, Member, IEEE Abstract— In this paper, we introduce the concept of witness and knowledge of each other, and need a way to evaluate the anonymity for peer-to-peer systems, as well as other systems with risk involved in a transaction. To address this issue, several the peer-to-peer nature. Witness anonymity combines the seem- research studies [10], [11], [20], [36] have proposed mecha- ingly conflicting requirements of anonymity (for honest peers who report on the misbehavior of other peers) and accountability (for nisms for building and using reputation-based trust models in malicious peers that attempt to misuse the anonymity feature to peer-to-peer systems. In these systems, a peer is assigned a trust slander honest peers). We propose the Secure Deep Throat (SDT) value or reputation based on a trust metric. Although various protocol to provide anonymity for the witnesses of malicious or systems differ in how this metric is defined, in general, the trust selfish behavior to enable such peers to report on this behavior value associated with a peer is calculated based on the feedback without fear of retaliation. On the other hand, in SDT, the misuse of anonymity is restrained in such a way that any malicious peer provided by other peers. Peers rate the performance or behavior attempting to send multiple claims against the same innocent peer of another peer based on their previous interactions. When a for