Table 6 Results for encryption using new S-box in different noisy environments
From: A highly nonlinear S-box based on a fractional linear transformation
Images | Entropy | Contrast | Correlation | Energy | Homog. |
|---|---|---|---|---|---|
Plain image | 7.4451 | 0.2100 | 0.9444 | 0.1455 | 0.9084 |
Encryption at \(\sigma =25\) | 7.1936 | 7.3974 | 0.0068 | 0.0153 | 0.3934 |
Encryption at \(\sigma =50\) | 7.1545 | 7.2851 | 0.0043 | 0.0161 | 0.3992 |
Encryption at \(\sigma =75\) | 7.1269 | 6.5029 | 0.0015 | 0.0180 | 0.4133 |