The Research Of A Trusted Remote Backup Model Of Peer-to-Peer Network

At present,the data plays important role in our life,and people concern the security of the data.Remote backup become an important technology to protect data.Meanwhile,the traditional technology's effect is not perfectly under the condition of large disaster,as it cost is high,poor scalability.So that,there need a reliable and cheap long-distance backup project urgently.P2P develop rapidly at present,it can take full advantage of the network geographically dispersed large idle resources.Meanwhile,it has many advantages,good scalability and low operating cost.However,P2P network's trust problem is prominent,so in this article we mainly purpose is to solve it which is the most important thing to build a remote data backup model.The article researched the disadvantages of the trust models and a improved model was put forward.We used Hybrid P2P network with super node model.During the trust value calculation,we introduced the concept of time frames,and we divided the trust values into two kind,which is short-term and long-term trust value,the smaller one as the trust value.The existing replica management strategy was improved to enhance the security and recoverability of the data.Besides,the relationships between the numbers and the availability of replica were given,the flow was reduced,and the replica number was appropriately controlled.The result of simulation experiments suggested that our model had better anti-aggression against simple malicious nodes compared with the classical trust model and nodes,it has higher successful interaction of oscillation malicious nodes and gangs'malicious nodes malicious behavior.