Research Article
A Chaotic Cryptosystem for Images Based on Henon and Arnold Cat Map
Table 15
Results of security analysis.
| | Image name | | | | Plain entropy | Cipher entropy | Plain image correlations | Cipher image correlations | UACI | NPCR | | HC | VC | DC | HC | VC | DC |
| Cameraman
256 × 256 | 1 | 1 | 1 | 7.0097 | 7.9969 | 0.8390 | 0.7189 | 0.6973 | | | | | | | 3 | 1 | 1 | 7.9976 | | | | | | | 1 | 3 | 1 | 7.9971 | | | | | | | 1 | 1 | 3 | 7.9972 | | | | | |
| Chess-plate
256 × 256 | 1 | 1 | 1 | 1 | 7.9970 | 0.9775 | 0.9800 | 0.9637 | | | | | | | 3 | 1 | 1 | 7.9974 | | | | | | | 1 | 3 | 1 | 7.9972 | | | | | | | 1 | 1 | 3 | 7.9973 | | | | | |
| Baboon
512 × 512 | 1 | 1 | 1 | 7.3579 | 7.9993 | 0.8644 | 0.7587 | 0.7261 | | | | | | | 3 | 1 | 1 | 7.9993 | | | | | | | 1 | 3 | 1 | 7.9993 | | | | | | | 1 | 1 | 3 | 7.9993 | | | | | |
| Peppers
512 × 512 | 1 | 1 | 1 | 7.5714 | 7.9993 | 0.8642 | 0.7587 | 0.7261 | | | | | | | 3 | 1 | 1 | 7.9993 | | | | | | | 1 | 3 | 1 | 7.9993 | | | | | | | 1 | 1 | 3 | 7.9993 | | | | | |
| Fingerprint
512 × 512 | 1 | 1 | 1 | 6.7279 | 7.9993 | 0.8644 | 0.7587 | 0.7261 | | | | | | | 3 | 1 | 1 | 7.9992 | | | | | | | 1 | 3 | 1 | 7.9994 | | | | | | | 1 | 1 | 3 | 7.9993 | | | | | |
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