Research Article
Nonlinear Multi-Image Encryption Scheme with the Reality-Preserving Discrete Fractional Angular Transform and DNA Sequences
Table 11
Global and local Shannon entropy analysis for the encrypted images.
| | Test group | Global Shannon entropy (bits) | Local Shannon entropy (bits) | Local Shannon entropy critical values (bits) | | | | | | |
| | 1 | 7.9978 | 7.9030 | Pass | Pass | Pass | | 2 | 7.9972 | 7.9026 | Pass | Pass | Pass | | 3 | 7.9973 | 7.9029 | Pass | Pass | Pass |
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