Research On Virus Detection And Prevention In P2P Network

In recent years, the wide application of P2P sharing technology leads a rapiddevelopment in the field of Internet content transmission. However, its distributionand openness makes it encounter the challenge of security problems, such as virusesand malicious code. There are a large number of nodes in P2P networks. But thesecurity of nodes and data communication between the nodes is low. Thecharacteristics of anonymous, fast sharing and dense transmission flow in P2Pnetworks provides a breeding ground and camouflage environment for viruses. P2Pviruses can spread to neighbor nodes through internal communication mechanismbetween the P2P nodes. The outbreak of the viruses can cause network congestionor even paralysis easily and bring serious harm to society. However, the securityresearch over P2P network structure and characteristics relatively lags behind.Therefore, the research on P2P virus detection and prevention has become animportant direction. This thesis mainly studies a virus detection algorithm applied toP2P networks, P2P virus detection and prevention methods based on peers and theconstruction of defense system.First, this paper analyzes the structure and characteristics of P2P network, themainstream protocol and its transfer mechanisms. The analysis of P2P virusspreading mechanism and reasons of the misses can help find the improvingdirection of virus detection and prevention. Then the paper designs a virus detectionalgorithm based on signatures, which is suitable for P2P network transmission. Andit proposes a P2P virus detection and prevention technology based on peers.Meanwhile this paper studies how to build and implement local nodes and thecentral node of virus detection and prevention using the above methods. It alsodesigns the schedule strategies and communication format between the central nodeand local nodes. At last, the experimental results demonstrate the effectiveness ofP2P virus detection and prevention technology and system studied in this paper.