Preventing Scan-Based Side-Channel Attacks by Scan Obfuscating with a Configurable Shift Register

Table 1

The state of example NSR.

0^th	0	0	0	0	0
1^st	X1	1	0	0	1
2^nd	X2		1	0	1
3^rd	X3			1	1
4^th	X4				0
5^th	X5				X1
	1	1	0	0	1