An Image Encryption Algorithm Based on Hyperchaotic System and Variable-Step Josephus Problem

Table 9

The resistance ability to noise attack of this algorithm.

Noisy intensity	Correlations			NPCR	UACI	MSE	PSNR
	Horizontal	Vertical	Diagonal
0	0.9573	0.9134	0.9066	0	0	0	Inf
0.01	0.9330	0.8939	0.8710	1.0391	0.3646	123.4764	27.2150
0.05	0.8324	0.8083	0.7852	4.8996	1.7195	585.6302	20.4546
0.1	0.7301	0.7138	0.7092	9.9579	3.4740	1172	17.4417