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

Table 3

ENT test results for , and outputs.

Statistical tests	y (8)-the last 8 bits	z (16)-the last 16 bits	u (8)	(16)	Ideal results	Results
Arithmetic mean	127.3353	127.1994	127.322	127.3249	127.5	Successful
Entropy	7.9985	7.9985	7.9985	7.9985	8	Successful
Correlation	−0.0051725	0.0031184	0.0030067	−0.00061494	0.0	Successful
Chi-square	253.6648	265.2769	262.594	252.6899	190–300	Successful
Monte Carlo	3.1396	3.149	3.1383	3.1352	3.14159	Successful
	Error = −0.00062338	Error = 0.0023713	Error = −0.0010512	Error = −0.0020291	(Pi)