Image Encryption Based on Dynamic Filtering and Bit Cuboid Operations

Table 3

The correlation coefficients of the testing images.

Image		Input images	Cipher images
			DFBC	HC-DNA [30]	CDCP [16]	CHC [17]	IC-BSIF [26]
		0.9494	-0.0041	0.0019	-0.0021	0.0006	-0.0067
Lena		0.9667	0.0023	-0.0030	-0.0042	-0.0003	0.0013
		0.9366	0.0040	0.0018	-0.0022	0.0048	0.0029
		0.9329	-0.0023	0.0076	-0.0022	-0.0069	0.0104
Cameraman		0.9566	0.0004	-0.0091	-0.0054	-0.0044	0.0039
		0.9117	0.0012	-0.0012	0.0048	0.0010	0.0003
		0.8940	0.0027	0.0010	-0.0026	0.0001	0.0003
Barbara		0.9572	-0.0029	0.0004	0.0006	0.0033	0.0015
		0.8942	-0.0005	-0.0009	0.0005	-0.0014	0.0009
		0.9375	0.0003	-0.0004	0.0010	0.0017	-0.0006
Airfield		0.9398	0.0039	0.0002	-0.0033	-0.0003	-0.0001
		0.9068	-0.0014	-0.0026	0.0013	-0.0008	0.0004
		0.9933	0.0004	-0.0012	-0.0016	-0.0012	0.0040
Histogram		0.9947	0.0013	0.0008	-0.0009	0.0042	0.0016
		0.9889	0.0011	0.0006	0.0001	-0.0004	0.0005
		0.8703	0.0030	-0.0049	-0.0005	0.0048	-0.0017
Terrain		0.6673	-0.0026	-0.0028	-0.0024	0.0011	0.0004
		0.6601	0.0012	-0.0012	-0.0019	0.0005	0.0017
		0.9957	-0.0014	-0.0002	0.0007	-0.0004	-0.0020
Parking		0.9888	0.0006	-0.0041	0.0018	0.0034	-0.0005
		0.9896	0.0004	0.0029	0.0004	-0.0006	0.0014
		0.9955	-0.0002	0.0013	-0.0021	0.0032	-0.0046
Monkey		0.9912	-0.0012	-0.0016	-0.0039	0.0010	-0.0010
		0.9938	0.0004	0.0007	-0.0008	-0.0000	0.0007