Security Research on P2P Network

P2P (peer-to-peer) network has been the new hotspot recently. It has widely applied in more and more fields and people have paid increasing attention to its security. In this paper, combined the characteristics of P2P network model and Web services transmission structure with the in-depth study on asymmetric algorithm (RSA), symmetric algorithm (DES), as well as the structure of digital certificate, it fulfills the following work: user identification by digital certificate; data encryption by symmetrical algorithm; symmetric key encryption with asymmetric algorithm; data signature using digital certification, and so on. Web Services are adopted as the underlying data framework to realize P2P data transmission solutions and it ensures the transmission security. Also a P2P file sharing system is designed and realized based on .NET framework. The feasibility of the proposed P2P security transmission model is certified and the experimental results and analyses are given in this paper.