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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。
Aiming at the problem that the existing broadcast encryption scheme can not protect the privacy of users, a broadcast encryption scheme with receiver anonymity is proposed based on bilinear constellation of multiple orders and Lagrange interpolation. Aiming at the lack of privacy protection in existing P2P social networks, a P2P social network privacy protection system is constructed based on anonymous broadcast encryption scheme. In the Android client design and implementation of the key algorithms and system function modules, and each module for functional verification. The verification results show that this anonymous broadcast encryption algorithm can effectively protect the user data while ensuring the distribution of user data and at the same time solve the problems of relying on the high cost of anonymous technology in the existing P2P social networks for privacy protection of user data or excessive exploitation of user rights Recipient’s privacy.