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 |
|
|