A New Chaos-Based Image-Encryption and Compression Algorithm

Table 2

Results of encryption of different amount for grayscale SF.GIF and ROAR512.JPG images using small and large keys sizes.

Image	Key size	Amount %	One key		Two keys		Three keys
			Cipher-image correlation	Reconstructed-image correlation	Cipher-image correlation	Reconstructed-image correlation	Cipher-image correlation	Reconstructed image correlation
1	Small	L1 = 25	0.07462337	0.99999286	0.03005224	0.99999287	0.00513192	0.99999287
		L2 = 6.25	0.14151426	0.99999784	0.13672353	0.99999784	0.0433832	0.99999784
1	Large	L1 = 25	0.01197778	0.99999286	0.00645548	0.99999287	0.00495562	0.99999287
		L2=6.25	0.07438078	0.99999784	0.02457648	0.99999784	0.00654208	0.99999784
2	Small	L1 = 25	0.13040771	0.99999835	0.05808717	0.99999836	0.04030919	0.99999836
		L2 = 6.25	0.24379369	0.99999949	0.15640678	0.99999949	0.07057224	0.99999949
2	Large	L1 = 25	0.01142504	0.99999835	0.00668093	0.99999836	0.00121170	0.99999836
		L2 = 6.25	0.10455903	0.99999491	0.07915913	0.99999492	0.02147876	0.99999492