中文摘要：

在移动互联网中,移动用户把个人位置信息发送到位置服务提供者并通过空间查询获取兴趣点数据;在连续空间查询中,用户沿着轨迹提交多个位置信息,这导致了严重的用户隐私风险。近年来,连续空间查询的位置隐私保护技术成为无线网络安全和隐私领域的研究热点。首先介绍了位置服务中的空间查询和隐私威胁;归纳了连续空间查询的隐私保护模型,并比较了对应的隐私保护方法。最后介绍了发展趋势并指明了未来的研究方向。

英文摘要：

In the mobile Internet, mobile users send their personal location information to location based service（LBS） pro- viders and obtain point of interest（POI） data via spatial queries. In a continuous spatial query,a user submits multiple locations along his trajectory. This query led to serious user privacy risks. Recently, the location privacy preservation technique of continuous spatial queries became a research hotspot in the wireless network security and privacy area. First, this paper introduced spatial queries and privacy threats in LBS. Next, it summed up privacy preservation models for continuous spatial queries, and compared the corresponding privacy preservation methods. Finally, it indicated the trends and future directions.