Research On Anonymous File Distribution Technology In P2P

With the development of Internet applications，the users are worrying about their privacyrights. Currently，TCP/IP protocol does not support the function of hidden communicationport address， therefore, the anonymity of the communication requirements attractedwidespread attention，the use of anonymous technology can protect themselves，meanwhilereduce their exposure to the risk of privacy.This research analyzed the domestic and abroad development level of the anonymous communications and file distribution,then proposed the P2P file distribution system ofanonymous which according to the users’ requirements. In this system, in order to solve theproblem of network congestion and paralysis which a malicious user to organize great numberof layers of data packets in succession, then a scheme of limit lifetime of packet was proposed.And in order to solve the problem of the anonymous destruction of co-collusion, a neutralthird-party scheme was proposed.In the scheme of limit lifetime of packet, the structure of the packet in MIX-net was used,the properties of the lifetime were added, and the mechanism of confusion was included, thecommunications of control packets lifetime was carried out effectively. And then, theanonymous channel of using the scheme has been implemented. The file distribution ofanonymous has been realized.The key element in the scheme of neutral third-party is to find the third-party who wastrusted by both sides completely. Both sides seek a trustful neutral third-party according tothe negotiation mechanism. It depended on the neutral third-party who completed thetransition of anonymous file. Realizing the process of receiving anonymous file, it ensuredthe file between receiver and storage is anonymous.The final result showed that this system could support anonymous file and transfer itefficiently, meanwhile it could resolve the problem of anonymous file distribution ofco-collusion in a better way.