Research Article
A Novel Image Encryption Algorithm Based on the Delayed Maps and Permutation-Confusion-Diffusion Architecture
Table 5
Information entropy of
gray images.
| Round | Image name | Global entropy | Local entropy | Critical value | No. of blocks = 30 | | | | Block size = 44 ∗ 44 | | | |
| 1 round | Lena | 7.9972 | 7.9024 | Pass | Pass | Pass | Peppers | 7.9972 | 7.9028 | Pass | Pass | Pass | Boats | 7.9972 | 7.9025 | Pass | Pass | Pass | Man | 7.9972 | 7.9027 | Pass | Pass | Pass | Camera | 7.9972 | 7.9025 | Pass | Pass | Pass |
| 2 rounds | Lena | 7.9972 | 7.9027 | Pass | Pass | Pass | Peppers | 7.9972 | 7.9025 | Pass | Pass | Pass | Baboon | 7.9972 | 7.9026 | Pass | Pass | Pass | Man | 7.9973 | 7.9027 | Pass | Pass | Pass | Camera | 7.9972 | 7.9028 | Pass | Pass | Pass |
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