Research Article
Securing Digital Images through Simple Permutation-Substitution Mechanism in Cloud-Based Smart City Environment
Table 8
Global and local information entropies for the investigated dataset.
| | Image | Global entropy | Local entropy | | Plain | Cipher | Plain | Cipher |
| | Boats | 7.19137 | 7.99923 | 6.10263 | 7.90249 | | Bridge | 5.70556 | 7.99927 | 4.81525 | 7.90286 | | Baboon | 7.35787 | 7.99918 | 6.66019 | 7.90322 | | Sailboat | 7.76216 | 7.99976 | 6.07741 | 7.90136 | | Airplane | 6.66391 | 7.99974 | 5.52864 | 7.90223 | | Peppers | 7.66982 | 7.99976 | 6.04964 | 7.90145 |
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