Research Article
An Image Encryption Algorithm Based on Hyperchaotic System and Variable-Step Josephus Problem
Table 5
Chi-square distribution of histograms with size 256 × 256.
| | Images | Plain images | Cipher images | Results |
| | Lena 256 × 256 | 39851.3281 | 244.8906 | Passed | | Cameraman 256 × 256 | 161271.875 | 215.1563 | Passed | | Baboon 256 × 256 | 79056.9063 | 204.2656 | Passed | | Boat 256 × 256 | 100853.492 | 254.9766 | Passed | | Brain 256 × 256 | 1044635.67 | 264.0469 | Passed |
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