计算机科学 ›› 2015, Vol. 42 ›› Issue (4): 101-105.doi: 10.11896/j.issn.1002-137X.2015.04.019
刘树波,李艳敏,刘梦君
LIU Shu-bo, LI Yan-min and LIU Meng-jun
摘要： 在基于位置服务系统中,为用户提供高质量服务的同时如何很好地保护用户的隐私(身份、行踪以及偏好等)仍然是一个挑战。针对这一挑战,提出了基于密文检索的位置服务用户隐私保护方案。在本方案中,位置服务提供商将其服务数据以及数据向量索引以密文的形式外包给云端,移动用户通过密文查询请求向云端查询所需服务,云端通过用户的查询以及服务数据索引计算出匹配度高的服务数据并返回给用户,整个交互过程都是以密文形式进行,云端以及外界得不到任何明文信息。本方案不依赖集中匿名器和用户协作,最后通过理论以及实验分析表明,本方案以低的计算开销有效地保护了用户的身份、位置以及查询偏好隐私。
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