Research On The Security Of Peer-to-peer Online Social Networks With Web-services

Nowadays P2P Online Social Networks(OSNs)have become one of the most important Internet platforms.P2P technology acts as the core of distributed systems,which is challenging the traditional Client/Server(C/S)model to provide high-scalability and high-efficiency services.It aims at solving the existing problem such as privacy disclosure and Ad.Placement in C/S model.Though,there are still many problems left in P2P OSNs in security and privacy,these issues are mainly raised from open architecture of P2P networks and malicious attacks in OSNs.Aiming at the issues mentioned above,first,we analyzed the P2P network security and encryption schemes.Then,a detailed analysis aiming at the network congestion caused by the bad structure in social network and the aggressive behavior of malicious nodes was given.Finally,we researched the issues of efficiency and security about an Inter-community Security System.The main contents of this paper are listed below.1.We studied the encryption technology and the resisting attack strategy in the traditional social network,then the broadcast encryption was introduced into the social network.In addition,we utilized the community-based broadcast encryption to improve the efficiency of the network.2.We proposed a hierarchical encryption algorithm model which could reduce time cost on encryption about 22%.Meanwhile,this model would also guarantee network stability as well as communication efficiency.3.In order to reduce transmission complexity,a secure transmission structure based on RESTful was proposed to optimize the scalability of the system.From results,system cost on communication could be decreased from 100 s to 79 s in average by applying community-based BE scheme so that improves system stabilities.Meanwhile,hierarchical encryption scheme could reduce encryption time cost about 5ms in average when user amount is over 10,000.