Research Article
Two-Phase Image Encryption Scheme Based on FFCT and Fractals
Table 3
NIST test results for peppers and encrypted peppers.
| | Test | Peppers | Encrypted peppers | | PV | PP | PV | PP |
| | Frequency | | 0.50 | | 1.000 | | Block frequency | | 0.000 | | 0.958 | | Cumulative sums | | 0.542 | | 0.979 | | Runs | | 0.458 | | 1.000 | | Longest run | | 0.000 | | 1.000 | | Rank | | 0.000 | | 1.000 | | FFT | | 0.000 | | 1.000 | | Nonover. template | | 0.000 | | 0.990 | | Overlapping template | | 0.000 | | 1.000 | | Universal | | 0.000 | | 0.958 | | Approximate entropy | | 0.000 | | 0.997 | | Random excursion | N\A | N\A | | 1.000 | | Ran. excursion variant | N\A | N\A | | 0.997 | | Serial | | 0.000 | | 0.959 | | Linear complexity | | 1.000 | | 1.000 | | Final result | Fail | Success |
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