Research Article
Two-Phase Image Encryption Scheme Based on FFCT and Fractals
Table 1
NIST test results for Mandrill and encrypted Mandrill.
| | Test | Mandrill | Encrypted Mandrill | | PV | PP | PV | PP |
| | Frequency | | 0.42 | | 1.000 | | Block frequency | | 0.000 | | 1.000 | | Cumulative sums | | 0.750 | | 1.000 | | Runs | | 0.250 | | 1.000 | | Longest run | | 0.000 | | 1.000 | | Rank | | 0.000 | | 1.000 | | FFT | | 0.000 | | 1.000 | | Nonover. template | | 0.000 | | 0.958 | | Overlapping template | | 0.000 | | 1.000 | | Universal | | 0.000 | | 1.000 | | Approximate entropy | | 0.000 | | 1.000 | | Random excursion | N\A | N\A | | 1.000 | | Ran. excursion variant | N\A | N\A | | 1.000 | | Serial | | 0.000 | | 1.000 | | Linear complexity | | 1.000 | | 1.000 | | Final result | Fail | Success |
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