Secure Smart Healthcare Monitoring in Industrial Internet of Things (IIoT) Ecosystem with Cosine Function Hybrid Chaotic Map Encryption

Table 11

CCs of two bordering pixels, plain and ciphered images (including test images).

Methods	Images		Plain images			Encrypted images
			H	V	D	H	V	D
Proposed	Pepper	R	0.9786	0.9820	0.9694	5.1e-04	1.2e-04	0.0017
		G	0.9775	0.9990	0.9650	0.0017	-6.7e0-4	-4.2e-04
		B	0.9760	0.980	0.9640	0.0031	1.6e-04	-3.5e-05
	Lake	R	0.9677	0.9663	0.9502	7.6e-04	-0.0016	0.0014
		G	0.9620	0.9640	0.9540	9.4e-04	-0.0011	-2.4e-04
		B	0.9670	0.9650	0.9520	0.0022	4.5e-04	0.0031
	P001 (keyframe 1)	R	0.9630	0.9760	0.9427	-0.0023	0.0017	5.5e-04
		G	0.9620	0.9740	0.9410	9.6e-04	0.0023	5.3e-04
		B	0.9605	0.9750	0.9430	2.2e-06	0.0022	-6.2e-04
	P002 (keyframe 2)	R	0.9578	0.9905	0.9511	2.3e-05	-4.3e-04	0.0032
		G	0.9560	0.9900	0.9505	0.0028	-9.1e-04	0.0033
		B	0.9570	0.9901	0.9500	5.2e-07	-3.3e-04	0.0011
	P003 (keyframe 3)	R	0.9554	0.9926	0.9498	6.16e-04	-0.0022	-3.1e-04
		G	0.9540	0.9910	0.9480	-5.3e-04	-0.0011	0.0012
		B	0.9545	0.9918	0.9490	0.0015	-0.0038	5.01e-04
	P004 (keyframe 4)	R	0.9578	0.9939	0.9525	3.12e-04	-0.0016	0.0011
		G	0.9500	0.9906	0.9510	0.0015	0.0024	-0.0022
		B	0.9565	0.9925	0.9520	-0.0013	0.0011	0.0023
	P005 (keyframe 5)	R	0.9494	0.9889	0.9386	3.23e-04	8.45e-05	0.0012
		G	0.9480	0.9875	0.9360	0.0016	0.0013	-0.0014
		B	0.9485	0.9870	0.9375	4.50e-05	0.0017	-0.0014