Research Article
A High-Security Privacy Image Encryption Algorithm Based on Chaos and Double Encryption Strategy
Table 1
NIST test of plaintext and ciphertext.
| | Statistical test | Plaintext | Ciphertext | | value | Result | value | Result |
| | Nonoverlapping template matching | 0 | No | 0.9797 | Yes | | Runs | 0 | No | 0.4389 | Yes | | Serial | 0 | No | 0.1111 | Yes | | Spectral | 0 | No | 0.2581 | Yes | | Rank | 0 | No | 0.4087 | Yes | | Random excursions | 0 | No | 0.5949 | Yes | | Cumulative sums | 0 | No | 0.2622 | Yes | | Frequency | 0 | No | 0.6028 | Yes | | Universal | 0 | No | 0.7112 | Yes | | Linear complexity | 0 | No | 0.2217 | Yes | | Longest run of ones | 0 | No | 0.1174 | Yes | | Approximate entropy | 0 | No | 0.2967 | Yes | | Random excursion variant | 0 | No | 0.3188 | Yes | | Block frequency | 0 | No | 0.4242 | Yes | | Overlapping template matching | 0 | No | 0.5079 | Yes |
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