Research On Rational Privacy-preserving Scheme Towards To Social Network

With the rapid development of social network,people are used to sharing their various information on the platform of social network.And the information may come to personal privacy.So more and more people begin to pay close attention to whether their own privacy information have the effective protection.Then social network privacy-preserving begins to the hot spot of the current research.The current social network privacy-preserving technologies mainly use the relevant mechanism to solve the problem of users' privacy disclosure.But they can't solve the problem of provably secure in social network.Although the existing privacy-preserving scheme can prevent attackers from easily obtaining users' privacy information,they ignore the problem of privacy protection results in the decrease of data availability.And from the perspective of game theory to study the balance between privacy and utility of social network is very suitable.To cure the above problems,this paper has done in-depth research for rational privacy-preserving scheme towards to social network.The main research contents are as follows:(1)On the provable security issue of social network privacy-preserving technologies,we construct the security model of privacy-preserving scheme based on provable security theory and use the bilinear mapping to design the node privacy-preserving method of social network.On this account,we put forward provably secure social network privacy-preserving scheme.Compared with the current privacy protection schemes,the scheme not only improves the ability of resisting to attack,but also realizes the security proof.(2)On the tradeoff issue between privacy and utility in social network,we use the method of game theory to put forward privacy-utility game model in social network.We provide an instance of social network privacy-utility game based on that game model.We also analyze the game's Bayesian Nash equilibrium and efficiency.(3)The specific application of provably secure social network privacy-preserving scheme.This paper specifically introduces the scheme's application in the WeChat and describes in detail the frame structure of the scheme and KM algorithm.We combine with WeChat's privacy-preserving strategies and technical architecture,then give to the specific application scheme of provably secure social network privacy-preserving scheme in the WeChat.