A New Group Location Privacy-Preserving Method Based on Distributed Architecture in LBS

Table 1

Symbol definitions.

	The group formed by the user nodes .
	The certain time of the group user ask for LBSs.
	The group location privacy-preserving request.
	The subscript to mark symbols.
	The geographic coordinate of the user ’s location.
	The weight sequence generated by the user .
	The noise sequence to disturb the users’ location coordinate produced by the noise generator.
	The new coordinates after the disturbance by the noise.
	The center location of the user group .