计算机科学 ›› 2023, Vol. 50 ›› Issue (5): 348-354.doi: 10.11896/jsjkx.220300207
涂思盼, 张琳, 刘茜萍
TU Sipan, ZHANG Lin, LIU Xiping
摘要： 目前大多假位置隐私保护方法没有充分考虑到攻击者可能掌握用户上次请求服务时所提交的信息等背景知识,因此不能有效抵御背景知识攻击。基于此,提出了基于行为关联的双重假位置生成算法,该算法包含两个部分,首先在充分考虑访问概率、位置语义等地理信息的基础上提出了初次假位置生成算法,然后根据时间可达性、方向相似性等用户行为信息提出了再次假位置生成算法,最后通过大量的仿真实验,验证了此算法能够抵御攻击者的推理攻击和相似性攻击。
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