An Iteration-Time Combination Method to Reduce the Dynamic Degradation of Digital Chaotic Maps

Table 3

NIST statistical test results.

Test index	values	Results
Approximate entropy	0.884121	Success
Block frequency	0.667705	Success
Cumulative sums	0.823636	Success
FFT	0.295498	Success
Frequency	0.528695	Success
Linear complexity	0.808946	Success
Random excursions	0.317492	Success
Random excursions variant	0.228489	Success
Longest runs of ones	0.265755	Success
Overlapping template of all ones	0.623520	Success
Rank	0.324251	Success
Runs	0.720640	Success
Serial	0.224261	Success
Universal statistical	0.368502	Success
Lempel–Ziv compression test	0.407865	Success