Abstract- P2P (Peer-to-Peer) e-commerce has rapid development and progressive maturity. It brings benefits along with the new business risk simultaneously. The lack of trust has become the main obstacle to e-commerce development. P2P is an equity network that connects up individual computer terminal directly to execute a variety of communication. Within the P2P network, people can directly connect to another computer to exchange files, rather than connect to a central server to browse and download as in the past. Lightshare is an example that has implemented e-commerce on the P2P network successfully. However, the users involved in the transaction have anonymity, and dispersion in space, which not only increase the convenience and flexibility of business activities but enlarge the risks and security threats of business activities. So, in this study, we will discuss the security and identity trust problem of e-commerce based on P2P.
Keywords: Security, Digital Signature, E-Commerce, P2P.