Table 2.

Average uniqueness and reliability of different types of PUF implemented in FPGA.

PUF Designs	Uniqueness (%)	Reliability (%)
SRAM PUF [8]	49.97	3.57
Basic RO PUF [10]	46.15	0.48
CRO PUF [11]	47.31	0.86
RRO PUF [18]	49.97	2.60
XCRO PUF [12]	48.76	2.28
Proposed CRO PUF	48.85	2.63