| Citation: | Dengguo FENG, Min ZHANG, Yutong YE. Research on Differentially Private Trajectory Data Publishing[J]. Journal of Electronics & Information Technology, 2020, 42(1): 74-88. doi: 10.11999/JEIT190632
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Securely sharing and publishing location trajectory data relies on support of location privacy protection technology. Prior to the advent of differential privacy, K-anonymity and its derived models provide a means of quantitative assessment of location-trajectory privacy protection. However, its security relies heavily on the background knowledge of the attacker, and the model can not provide perfect privacy protection when a new attack occurs. Differential privacy effectively compensates for the above problems, and it proves the level of privacy protection based on rigorous mathematical theory and is increasingly used in the field of trajectory data privacy publishing. Therefore, the trajectory privacy protection technology based on differential privacy theory is studied and analyzed, and the methods of spatial statistical data publishing are introduced such as location histogram and trajectory histogram, the method of trajectory data set publishing and the model of continuous real-time location release privacy protection. At the same time, the existing methods are compared and analyzed, the key development directions are put forward in the future.
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