Research Article
An Image Encryption Algorithm Based on Hyperchaotic System and Variable-Step Josephus Problem
Table 3
Key sensitivity of decryption process.
| Initial values | NPCR | UACI | MSE | PSNR |
| x1 + 10−10 | 99.5895 | 33.9695 | 11341 | 7.5841 | y1 + 10−10 | 99.5819 | 33.2737 | 11509 | 7.5201 | z1 + 10−10 | 99.5560 | 33.4204 | 11582 | 7.4928 | + 10−10 | 99.6200 | 33.4349 | 115891 | 7.4903 |
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