A Novel Image Encryption Algorithm Based on a Fractional-Order Hyperchaotic System and DNA Computing

Table 7

The correlation coefficients of the testing images.

Image		Input images	Cipher images
			FOHCLDNA	HC-DNA [29]	CDCP [40]	CHC [41]
Lena		0.9494	0.0054	0.0019	−0.0021	0.0006
		0.9667	0.0035	−0.0030	−0.0042	−0.0003
		0.9366	0.0016	0.0018	−0.0022	0.0048
Cameraman		0.9329	−0.0010	0.0076	−0.0022	−0.0069
		0.9566	−0.0088	−0.0091	−0.0054	−0.0044
		0.9117	0.0027	−0.0012	0.0048	0.0010
Circuit		0.9766	0.0012	0.0019	0.0026	−0.0036
		0.9775	−0.0071	0.0041	0.0030	0.0022
		0.9678	−0.0001	−0.0012	0.0021	0.0018
Peppers		0.9733	−0.0009	0.0009	−0.0015	−0.0017
		0.9763	−0.0021	0.0041	−0.0012	−0.0003
		0.9650	−0.0013	0.0008	0.0017	−0.0006
Barbara		0.8271	0.0010	0.0011	−0.0038	0.0034
		0.9501	−0.0030	0.0006	−0.0028	0.0003
		0.8310	0.0007	−0.0038	−0.0004	0.0009
Bridge		0.9388	−0.0029	0.0007	0.0036	0.0008
		0.9217	−0.0033	0.0036	0.0014	0.0035
		0.8988	−0.0002	0.0023	0.0018	0.0027
Plane		0.9599	0.0017	−0.0017	0.0004	0.0005
		0.9613	0.0021	0.0020	0.0018	−0.0003
		0.9359	0.0015	−0.0007	0.0013	0.0010
Aerial		0.9083	0.0015	−0.0010	−0.0006	−0.0025
		0.8891	−0.0022	0.0034	0.0010	−0.0045
		0.8502	−0.0015	0.0022	0.0026	−0.0014