Feature Selection Based on Cross-Correlation for the Intrusion Detection System

Table 2

Improvement percentage of the proposed method (CCFS) in comparison with the CFA method for the DT classifier.

KDD Cup 99
Number of features	CCFS improvement versus CFA (%)
	Accuracy	Precision	Recall	F1-score
41	1.42	3.40	2.19	2.79
35	2.05	2.61	2.61	2.61
30	0.72	0.82	0.16	0.49
25	1.83	3.70	3.35	3.52
20	0.52	0.99	2.16	1.57
15	0.48	0.13	0.51	0.32
10	0.20	1.62	1.62	1.62
5	1.06	2.50	1.86	2.18