Table 16 Results comparison for XNOR gate.

From: Efficient design and analysis of secure CMOS logic through logic encryption

Encryption methodology

Switch count

Area, μm2

Power, nW

Delay, ps

PDP, aJ

Standard cell

12

7.20

503.5

50

25.17

Key based XNOR PT without buffer

16

9.61

692.3

87

60.23

Key based XNOR PT with buffer

20

11.97

1200

89

106.8

XOR based

24

14.36

1101

80

88.08

LUT based

40

23.91

1393

119

165.76

Stack based

–

–

–

–

–

Proposed XNOR/AND

14

8.41

550

62

34.1