Towards Region Queries with Strong Location Privacy in Mobile Network

Table 1

Notations.

Symbol	Description
	User location
	Query region presented by user
	A minimum cloaking region selected by MC
	The degree of -anonymity
	Location -diversity
	Query -diversity
	The set of POIs category
	A subset of C
	Candidate set
	Coordinate set of POIs picked by user
	Service information of POIs
	Encryption key