Achieve Efficient and Privacy-Preserving Compound Substring Query over Cloud

Algorithm 3

Filter elements in according to function .

(1)	let be the minimum-size element in .
(2)	let be an empty set.
(3)	for each do
(4)
(5)	for each do
(6)
(7)	for each do
(8)
(9)
(10)	end for
(11)	end for
(12)
(13)	insert to ;
(14)	end for
(15)	return