Table 1 Results of the SP800-22 tests.

From: Medical image encryption algorithm based on a new five-dimensional multi-band multi-wing chaotic system and QR decomposition

Test name

P-value

Result

NIST test results

 Approximate entropy

0.3549

Pass

 Block frequency

0.4303

Pass

 Cumulative sums (forward)

0.6848

Pass

 Cumulative sums (reverse)

0.9581

Pass

 FFT

0.4506

Pass

 Frequency

0.9965

Pass

 Linear complexity

0.0650

Pass

 Longest run of ones

0.1067

Pass

 Non-overlapping template

0.6423

Pass

 Overlapping template

0.7682

Pass

 Random excursions

0.7999

Pass

 Random excursions variant

0.1199

Pass

 Rank

0.012

Pass

 Runs

0.5606

Pass

 Serial test

0.1406

Pass

 Universal

0.1998

Pass

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