FPGA Implementation of Improved Security Approach for Medical Image Encryption and Decryption

Table 10

Results of NIST 800-22 statistical test for the proposed PRNG.

Statistical	value	Status
Status frequency	0.9015	Pass
Block frequency (m = 128)	0.563	Pass
Forward cusum	0.648	Pass
Reverse cusum	0.672	Pass
Runs	0.672	Pass
Long runs of ones	0.644	Pass
Binary matrix rank	0.523	Pass
Spectral DFT	0.892	Pass
Nonoverlapping template (m = 9)	0.426	Pass
Overlapping template (m = 9)	0.619	Pass
Universal	0.473	Pass
Approximate entropy (m = 10)	0.456	Pass
Random excursions (x = + 1)	0.924	Pass
Random excursions’ variant (x = −1)	0.693	Pass
Linear complexity (M = 500)	0.586	Pass