Identification approach of P2P flow based on the content redistribution model

With the development of P2P technology, tradition methods based on application port number and matching protocol-specific signatures in payload cannot provide acceptable accuracy any more. In this paper, a content redistribution model of P2P network was proposed. Based on this redistribution model, an identification algorithm was also developed. The proposed model is based on the underlying characteristics of P2P protocol, each peer acting both as a server and a client, so redistributing the received content to other peers. Theoretical analysis and experiments show that the approach is more suitable for identifying traffic that is generated by P2P streaming and highly sought-after resource sharing.