Research Article

Pseudorandom Number Generator Based on Three Kinds of Four-Wing Memristive Hyperchaotic System and Its Application in Image Encryption

Table 2

The results of NIST test suite.

Statistical testProportionResults

Frequency0.96670.074177Success
Block Frequency0.99170.585209Success
Cumulative Sums0.97500.051391Success
Runs0.99170.980883Success
Longest Run0.96670.378138Success
Rank0.99170.213309Success
Fft0.97500.931952Success
Nonoverlapping Template10.772760Success
Overlapping Template0.98330.970538Success
Universal0.98330.337162Success
Approximate Entropy0.99170.222869Success
Random Excursions10.437274Success
Random Excursions Variant10.706149Success
Serial0.99170.324180Success
Linear Complexity0.99170.048716Success