计算机科学 ›› 2018, Vol. 45 ›› Issue (5): 139-142.doi: 10.11896/j.issn.1002-137X.2018.05.023
任晖,戴华,杨庚
REN Hui, DAI Hua and YANG Geng
摘要： 基于云计算的外包服务模式因节省计算、存储等资源配置和维护成本 而被越来越多的公司和个人所使用。然而,资源外包模式也使得数据拥有者失去对其数据的直接控制,敏感数据的隐私保护问题日益凸显。排序是计算机中常用的一种操作,数据加密是云环境中常用的隐私保护策略。如何在不泄露明文信息的前提下实现基于密文的隐私保护排序,是一个难点问题。文中提出面向云环境的基于安全比较码的隐私保护排序方法。通过引入0-1编码和HMAC来构造安全比较码机制；数据所有者对其敏感数据进行加密和编码预处理,将生成的密文和安全比较码外包存储至云服务端；此时云服务器即可利用安全比较码实现无需明文数值参与的密文数据排序,从而实现针对数据拥有者外包数据的隐私保护排序。实验结果表明,隐私保护排序方法在时间和空间上均优于现有同类方法。
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