基于LBS系统的位置轨迹隐私保护技术综述

基于位置的服务（LBS）方式为用户生活带来了便捷，同时也存在着位置轨迹隐私泄露的风险。如何对这些隐私数据加以保护，成为目前研究者的研究热点。对现有的隐私保护方法系统架构进行总结，对位置隐私保护技术和轨迹隐私保护技术进行综述，分类介绍了基于扭曲技术、加密技术、匿名技术以及差分隐私技术的隐私保护方法，对各种隐私保护技术下的最新算法进行整理归纳。根据对已有技术的了解，提出了现有研究中存在的不足以及未来研究的方向。

Overview of location trajectory privacy protection technology based on LBS system

Location-based service(LBS) has brought convenience to users'' lives, but there is also a risk of disclosure of location track privacy. How to protect these private data has become a research hotspot of researchers. This paper introduced the system architecture of existing privacy protection methods, summarized the location privacy protection technology and trajectory privacy protection technology, classify expound the privacy protection methods based on distortion technology, encryption technology, anonymity technology and differential privacy technology and sorted out the latest algorithms under various privacy protection technologies. According to the understanding of the existing technologies, it put forward the shortcomings in the present research and the future research direction.