Table 1.

Success ratio of three types of RO PUFs in the NIST randomness test.

NIST Algorithms	Success Ratio (%)
	Basic RO PUF [10]	CRO PUF [17]	Our Proposal
Frequency	96	99	98
Block Frequency	96	100	99
Runs	97	100	100
Longest Runs	97	100	100
Discrete Fourier Transform	94	97	96
Serial	96	99	96
Approximate Entropy	97	98	97
Cumulative Sums	98	99	98