Table 9.
The result of the information entropy of some encrypted images.
| Image | Plain-Image | Cipher-Image | ||||
|---|---|---|---|---|---|---|
| R | G | B | R | G | B | |
| Lena | 5.0465 | 5.4576 | 4.8001 | 7.9992 | 7.9993 | 7.9994 |
| Baboon | 6.4998 | 6.4445 | 6.2709 | 7.9991 | 7.9992 | 7.9992 |
| Fruits | 7.5172 | 7.3230 | 6.7785 | 7.9992 | 7.9992 | 7.9993 |
| Flowers | 7.3824 | 7.2345 | 7.3641 | 7.9990 | 7.9990 | 7.9991 |
| Girl | 7.4346 | 7.2354 | 7.0578 | 7.9995 | 7.9995 | 7.9996 |
| Flower | 7.4428 | 7.4062 | 7.3371 | 7.9992 | 7.9993 | 7.9992 |
| Yacht | 7.6071 | 7.4062 | 7.3371 | 7.9994 | 7.9991 | 7.9993 |
| Lena in Ref. [14] | – | – | – | 7.9994 | 7.9994 | 7.9994 |
| Lena in Ref. [16] | – | – | – | 7.9914 | 7.9915 | 7.9916 |
| Lena in Ref. [37] | – | – | – | 7.9974 | 7.9975 | 7.9969 |
| Lena in Ref. [38] | – | – | – | 7.9972 | 7.9972 | 7.9976 |
| Lena in Ref. [39] | – | – | – | 7.9975 | 7.9972 | 7.9973 |
| Lena in Ref. [41] | – | – | – | 7.9942 | 7.9943 | 7.9942 |