Anticollusion Attack Strategy Combining Trust Metrics and Secret Sharing for Friendships Protection

Algorithm 1

Friendships_transform.

	Input: : of the target user
	Output: : the secret to share
(1)	Get the s of the top friends of the target node: , , , , ;
(2)	;
(3)	if is prime then
(4)
(5)	else
(6)	;
(7)	end if