Image Encryption Algorithm Based on Adaptive Wavelet Chaos

Table 3

Statistical tests result.

Test class	Proportion	value
Frequency	0.9850	0.84672
Block frequency	0.9980	0.57986
Cumulative sums (forward)	0.9850	0.49073
Cumulative sums (reverse)	0.9880	0.46982
Runs	0.9920	0.31092
Rank	0.9930	0.12098
Fft	0.9850	0.95823
Nonperiodic templates^Δ	0.9870	0.95621
Overlapping templates	0.9900	0.60925
Universal	0.9780	0.18251
Approximate entropy	0.9800	0.66823
Random excursions^Δ	0.9860	037874
Random excursion variant^Δ	0.9860	0.26987
Serial I	0.9960	0.39023
Serial II	0.9910	0.16934
Linear complexity	0.9940	0.24549

^ΔTest contains multiple subtests, listed as worst case.