A Novel Security Methodology for Smart Grids: A Case Study of Microcomputer-Based Encryption for PMU Devices

Table 2

RNG NIST-800-22 test results for , and outputs.

Statistical tests	y (8)	z (16)	u (8)	(16)
Frequency (Monobit) test	0.2142	0.9712	0.2974	0.0945
Block frequency test	0.7545	0.7000	0.0581	0.4610
Cumulative sum test	0.3829	0.4886	0.3897	0.1016
Runs test	0.6075	0.9904	0.8611	0.8342
Longest run test	0.4854	0.9275	0.9225	0.4248
Binary matrix rank test	0.7728	0.1876	0.5529	0.2004
Discrete Fourier transform test	0.1323	0.9414	0.4140	0.0289
Nonoverlapping templates’ test	0.3973	0.0168	0.0202	0.0533
Overlapping templates’ test	0.5982	0.8957	0.5830	0.7414
Maurer’s universal statistical test	0.2457	0.7903	0.3924	0.7780
Approximate entropy test	0.7247	0.9430	0.9008	0.6912
Random excursion test	0.2953	0.6938	0.8843	0.4569
Random excursion variant test	0.6888	0.6522	0.6050	0.3386
Serial test-1	0.6993	0.9187	0.0464	0.8103
Serial test-2	0.2423	0.4510	0.0129	0.9127
Linear complexity test	0.9728	0.2036	0.6666	0.6098