Application of deep packet inspection in peer-to-peer traffic identification

Current P2P applications use various obfuscation techniques to avoid detection, the technique of deep packet inspection (DPI) can detect the characteristics string in P2P protocols, which is regarded as a promising method for future peer-to-peer traffic identification. one prototype system of P2P traffic detection is implemented. This system adopts off-line detection method, and it can identify P2P traffic when analyzing the captured files by Sniffer software. The test result shows that the system can accurately detect the P2P traffic.