The method of P2P traffic detecting for P2P harmful contents prevention

Conventionally, a main interest in a computer security has been focused on protection of a computer system itself, i.e., protection against viruses or system attacks such as denial of service attacks (DoS attack), or communication encryption used for cash transfer service at a bank. However, with regard to influence given by exchanging contents to human beings, a research on automatic detection and blocking of obviously harmful information is now required. Some large companies have already constructed a monitoring system in their own intranet to prepare outflow of essential company secrets. The construction of monitoring and protection system may lead to invasion of private information so that there may occur an extremely subtle legal problem. Therefore, a method of developing a system detecting and preventing obviously harmful information or illegal information is required. In this paper, we design the method of monitoring and preventing P2P traffic. It is a part of harmful contents preventing in the peer to peer network