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
L
2
=
6
.
2
5
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