Preprocessing Method for Encrypted Traffic Based on Semisupervised Clustering

Algorithm 2

SMFS.

	Input: , ,
	Output: Best feature subset (BFS), Clustering result (CR)
(1)	select a cluster algorithm
(2)	calculate initial confusion matrix for
	obtain FPRini, TPRini
(3)	for backward selection and exclude do
(4)	calculate confusion matrix for
(5)	if FPR < FPRlast:
(6)	exclude
(7)	FPRlast = FPR, TPRlast = TPR
(8)	if FPR = FPRlast and TPR ≥ TPRlast:
(9)	exclude
(10)	FPRlast = FPR, TPRlast = TPR
(11)	if FPR > FPRlast:
(12)	retain
(13)	end
(14)	obtain feature subset as BFS, CR for and
(15)	return BFS, CR.