Privacy-Preserving Query Scheme (PPQS) for Location-Based Services in Outsourced Cloud

Algorithm 2

Encrypted database generation.

Input: LBSP, , , , , ,
Output: ,
(1)	Initialize to an empty array, to an empty database, and to an empty list;
(2)	for each do
(3)
(4)	, and ;
(5)	for each do
(6)	;
(7)	;
(8)	;
(9)	;
(10)
(11)	;
(12)	;
(13)	end for
(14)	;
(15)	;
(16)	;
(17)	end for