Development of a Novel Hyperchaos-Based Image Encryption Algorithm Consisting of Two Scrambling-Diffusion Operations

Table 1

Results of a randomness test.

Items	-values	Results
Approximate entropy	0.684325	Success
Block frequency	0.201642	Success
Cumulative sums (forward)	0.448463	Success
Fast Fourier transform (FFT)	0.742726	Success
Frequency	0.640642	Success
Linear complexity	0.998936	Success
Longest run	0.503063	Success
Nonoverlapping template	0.829020	Success
Overlapping template	0.946675	Success
Rank	0.903588	Success
Runs	0.749820	Success
Serial -value 1	0.517025	Success
Serial -value 2	0.824740	Success
Universal	0.355340	Success
Random excursions X = −4	0.292475	Success
Random excursions X = −3	0.665211	Success
Random excursions X = −2	0.201510	Success
Random excursions X = −1	0.785998	Success
Random excursions X = 1	0.056035	Success
Random excursions X = 2	0.567424	Success
Random excursions X = 3	0.375432	Success
Random excursions X = 4	0.802170	Success
Random excursions variant X = −9	0.993779	Success
Random excursions variant X = −8	0.874679	Success
Random excursions variant X = −7	0.820132	Success
Random excursions variant X = −6	0.564102	Success
Random excursions variant X = −5	0.301069	Success
Random excursions variant X = −4	0.144795	Success
Random excursions variant X = −3	0.078193	Success
Random excursions variant X = −2	0.150287	Success
Random excursions variant X = −1	0.296088	Success
Random excursions variant X = 1	0.074375	Success
Random excursions variant X = 2	0.135122	Success
Random excursions variant X = 3	0.284107	Success
Random excursions variant X = 4	0.841091	Success
Random excursions variant X = 5	0.588381	Success
Random excursions variant X = 6	0.415502	Success
Random excursions variant X = 7	0.284619	Success
Random excursions variant X = 8	0.233579	Success
Random excursions variant X = 9	0.167543	Success