两方参与的隐私保护协同过滤推荐研究

 隐私保护的协同过滤推荐研究致力于在确保高质、高效地产生推荐的同时有效地保护参与方的隐私.在数据分布存储,参与方大于2的情形,已有研究针对其核心任务——对指定项进行评分预测,以可交换的密码系统为主要技术,设计了一个隐私保护计算协议.但该协议不适用于参与方是2的情形.以安全比较计算和安全点积计算为基础安全设施,设计了一个协议,解决参与方是2的情况下对指定项进行评分预测的隐私保护问题,从而解决了隐私保护的两方协同计算问题.预测准确度与数据集中存放一样,证明了协议的正确性,并基于安全多方计算理论和模拟范例,证明其安全性,分析了时间复杂度和通信耗费.

Research on Privacy-Preserving Two-Party Collaborative Filtering Recommendation

Privacy-preserving collaborative filtering aims at protecting participating parties' privacy while providing high-quality recommendations efficiently.In the case of the number of the participating parties is greater than 2,a protocol,employing commutative encryption as its major privacy-preserving technique,has been devised to address the issue of rating a specific item in scenarios with distributed data storage,which is a key challenge in privacy-preserving collaborative filtering recommendation in that sc...