基于匿名广播加密的P2P社交网络隐私保护系统

针对已有的广播加密方案无法很好地对用户的隐私进行保护问题,提出了基于合数阶双线性群以及拉格朗日插值法的具有接收者匿名性的广播加密方案。并针对现有的P2P社交网络存在的隐私保护方面的不足,基于匿名广播加密方案构建了P2P社交网络隐私保护系统。在Android客户端设计与实现了关键算法及系统的功能模块,并对各模块进行了功能验证。验证结果表明该匿名广播加密算法在保证对用户数据进行分发同时,解决了已有P2P社交网络中依赖高代价匿名技术来对用户数据进行隐私保护或者用户权限的过度开放等问题,有效地保护了接收者的隐私性。

A P2P network privacy protection system based on anonymous broadcast encryption scheme

Aiming at the problem that the existing broadcast encryption scheme cannot protect the users privacy well, we proposed a broadcast encryption scheme with the receiver anonymity based on composite order bilinear groups and Lagrange interpolation method. And aiming at the low privacy protection in the existing P2P network system, we constructed a P2P network privacy protection system based on the proposed anonymous broadcast encryption scheme. Then,we designed and implemented function modules of the system by Android, and verified every modules function. The results show that the proposed anonymous broadcast encryption algorithm can distribute the users data and effectively protect the privacy of the receiver, at the same time, solve the problems that exist in the existing in P2P networks which rely on expensive anonymous technology to protect user data privacy and the excessive open of user permission.