Unchained Cellular Obfuscation Areas for Location Privacy in Continuous Location-Based Service Queries

Table 1

Security comparison chart for multi-LBS queries.

Protocols	Attacker knowledge
	LHA	MM	MQA	MMB	VBA	KA
Xu and Cai ‎[21]	X	O	O	O	X	X
Xu and Cai‎ [14]	O	O	O	O	X	X
Shankar et al. ‎[15]	O	O	O	O	O	O
Wang and Liu [22]	O	O	X	O	O	X
Ardagna et al. ‎[20]	O	O	O	X	O	O
Lee et al. ‎[23]	O	O	O	O	X	X
Song et al. ‎[24]	O	O	O	O	X	X
Niu et al.‎ [25]	O	O	O	O	X	X
Niu et al.‎ [3]	X	O	X	O	O	O
Our scheme	O	O	O	O	O	O