A privacy-preserving method for lbs based on location semantics k-anonymity
A technology of privacy protection and semantics, applied in the direction of location-based services, security devices, electrical components, etc., can solve the problems of user location semantic privacy exposure, no location semantic information analysis, etc., and achieve the effect of convenient integration
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[0055] The invention will be described in further detail below in conjunction with the accompanying drawings.
[0056] First some basic definitions are given:
[0057] Definition 1 Movement trajectory: an ordered list of locations that record the user's continuous movement, defined as T PID =(1 ,t 1 >,2 ,t 2 >,...,n ,t n >),t 1 2 ...n , where PID represents the pseudonym identification of the trajectory, p i =(x,y),1≤i≤n,p i Indicates that the user is at t i The spatial position at the time, x, y represent the horizontal and vertical coordinate values of the track point.
[0058] Definition 2 space division: For a 2-dimensional geometric space R that contains a moving track data set 2 ={p i |1≤i≤m},p i Indicates the spatial position of the trajectory point, and the corresponding 2-dimensional geometric space division is defined as: DR 2 ={Cell(col, row)|1≤col≤col_count, 1≤row≤row_count}, where each Cell(col, row) is called a space grid, and col, row represent the ...
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