It can become an uploader or downloader in the network. After a P2P client is initiated, it will be connected to the P2P network as one of the participants. ![]() Peer: A peer represents a P2P user/client program in a P2P network. Resource link-based network: A resource link-based network is a P2P network where files are being announced to interested downloaders by providing a resource link locator. In this section, we will briefly describe the mainstream classifications and take a few popular networks as examples for illustrating the differences. The authors believe their findings provide a foundation for future development in P2P file-sharing networks investigation. Also, the rules have been demonstrated to be applicable to some simulated cases. By observing the behaviors of these networks, they propose some heuristic rules for identifying the first uploader of a shared file. In this chapter, the authors briefly review the characteristics of current P2P networks. Unfortunately, hindered by the distributed design and anonymous nature of these networks, P2P investigation can be practically difficult and complicated. These incidents have urged the authors to develop an investigation model for tracing suspicious P2P activities. Recently, a number of documents containing personal data or sensitive information have been shared in an unbridled manner over the Foxy network (a popular P2P network in Chinese regions). These networks are famous for their excellent file transfer rates and adversely, the flooding of copyright-infringed digital materials. ![]() ![]() AbstractThe community of peer-to-peer (P2P) file-sharing networks has been expanding swiftly since the appearance of the very first P2P application (Napster) in 2001.
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