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

Table 10

The indicators of decrypted cameraman images after data loss attacks.

Images	Correlations			NPCR	UACI	MSE	PSNR
	Horizontal	Vertical	Diagonal
Original image	0.9573	0.9134	0.9066	0	0	0	0
1/64	0.9170	0.9032	0.8626	1.5564	0.5450	185.8057	25.4402
1/16	0.8127	0.7787	0.7647	6.2302	2.1481	723.7883	19.5347
1/4	0.5053	0.4704	0.4504	24.9039	8.5963	2887.4	13.5257