《计算机应用》唯一官方网站 ›› 2024, Vol. 44 ›› Issue (5): 1546-1554.DOI: 10.11772/j.issn.1001-9081.2023050680

• 网络空间安全 • 上一篇    

基于轨迹扰动和路网匹配的位置隐私保护算法

刘沛骞1, 王水莲2, 申自浩2, 王辉1()   

  1. 1.河南理工大学 软件学院,河南 焦作 454000
    2.河南理工大学 计算机科学与技术学院,河南 焦作 454000
  • 收稿日期:2023-05-30 修回日期:2023-07-30 接受日期:2023-08-11 发布日期:2023-09-01 出版日期:2024-05-10
  • 通讯作者: 王辉
  • 作者简介:刘沛骞(1970—),男,山西大同人,副教授,博士,主要研究方向:机器学习、自然语言处理、信息安全
    王水莲(1999—),女,河南周口人,硕士研究生,主要研究方向:网络信息安全、智能信息处理
    申自浩(1980—),男,河南南阳人,副教授,博士,主要研究方向:网络与信息安全、智能信息处理、信息仿真
    第一联系人:王辉(1975—),男,河南焦作人,教授,博士,主要研究方向:移动互联网隐私保护、网络信息安全、信息系统研发及仿真。
  • 基金资助:
    河南省高等学校重点科研项目(23A520033);河南理工大学博士基金资助项目(B2022?16)

Location privacy protection algorithm based on trajectory perturbation and road network matching

Peiqian LIU1, Shuilian WANG2, Zihao SHEN2, Hui WANG1()   

  1. 1.School of Software,Henan Polytechnic University,Jiaozuo Henan 454000,China
    2.School of Computer Science and Technology,Henan Polytechnic University,Jiaozuo Henan 454000,China
  • Received:2023-05-30 Revised:2023-07-30 Accepted:2023-08-11 Online:2023-09-01 Published:2024-05-10
  • Contact: Hui WANG
  • About author:LIU Peiqian, born in 1970, Ph. D., associate professor. His research interests include machine learning, natural language processing, information security.
    WANG Shuilian, born in 1999, M. S. candidate. Her research interests include network information security, intelligent information processing.
    SHEN Zihao, born in 1980, Ph. D., associate professor. His research interests include network and information security, intelligent information processing, information simulation.
  • Supported by:
    Key Scientific Research Projects of Colleges and Universities in Henan Province(23A520033);Doctoral Scientific Fund of Henan Polytechnic University(B2022?16)

摘要:

针对现有扰动机制未考虑位置点语义关系导致数据可用性较低的问题,提出一种基于差分隐私(DP)的轨迹位置隐私保护机制(DP-TLPM)。首先,DP-TLPM利用滑动窗口提取轨迹停留点生成模糊区域,再利用指数机制和拉普拉斯机制对该区域进行采样;其次,为了消除采样点中可能存在的无语义位置点,提出一种路网匹配算法,对轨迹分段并利用误差椭圆匹配(EEM)进行迭代匹配;最后,根据匹配后的位置点形成扰动轨迹,由用户端将扰动轨迹发送至服务器。实验以混淆质量和均方根误差(RMSE)为评价标准对该机制进行综合评测。与GeoInd算法相比,DP?TLPM的数据质量损失降低了24%,轨迹的混淆质量提高了52%,从隐私保护强度和数据质量两方面验证了该算法的有效性。

关键词: 轨迹隐私保护, 路网匹配, 位置扰动, 拉普拉斯机制

Abstract:

Aiming at the problem of low data availability caused by existing disturbance mechanisms that do not consider the semantic relationship of location points, a Trajectory Location Privacy protection Mechanism based on Differential Privacy was proposed, namely DP-TLPM. Firstly, the sliding windows were used to extract trajectory dwell points to generate the fuzzy regions, and the regions were sampled using exponential and Laplacian mechanisms. Secondly, a road network matching algorithm was proposed to eliminate possible semantic free location points in the sampled points, and the trajectory was segmented and iteratively matched by using Error Ellipse Matching (EEM). Finally, a disturbance trajectory was formed based on the matched location points, which was sent to the server by the user. The mechanism was evaluated comprehensively by confusion quality and Root Mean Square Error (RMSE). Compared with the GeoInd algorithm, the data quality loss of the DP-TLPM is reduced by 24% and the confusion quality of the trajectories is improved by 52%, verifying the effectiveness of DP-TLPM in terms of both privacy protection strength and data quality.

Key words: trajectory privacy protection, road network matching, position disturbance, Laplacian mechanism

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