A Trajectory Privacy Protect Method Based on Location Pair Reorganization

Table 1

Summary of notation.

Symbol	Notion
	Historical trajectory dataset/th trajectory in historical trajectory dataset
	Real trajectory/th location point
	Semantic trajectory/th semantic location point
	Trajectory equivalence class/th trajectory in the class
	Semantic trajectory equivalence class/th semantic trajectory
	Set of candidate location/th candidate location
	Fake semantic trajectory
	The set of dummy trajectories forming the -anonymity set
	Fake trajectory in
	Geographical similarity/semantic similarity/directional similarity