A Novel Image Encryption Scheme Based on PWLCM and Standard Map

Table 13

Randomness of the encrypted image analysis.

Test items	value	Results
The frequency (monobit) test	0.6035	Pass
Frequency test within a block	0.3020	Pass
The runs test	0.3760	Pass
Tests for the longest-run-of-ones in a block	0.6157	Pass
The binary matrix rank test	0.1485	Pass
The discrete Fourier transform (spectral) test	0.5617	Pass
The non-overlapping template matching test	0.9584	Pass
The overlapping template matching test	0.8423	Pass
Maurer’s “universal statistical” test	0.1707	Pass
The linear complexity test	0.5492	Pass
The serial test	0.0835	Pass
The approximate entropy test	0.9292	Pass
The cumulative sums (cusums) test	0.9374	Pass
The random excursions test	0.6948	Pass
The random excursions variant test	0.2333	Pass