Question: Fig. 1 shows a ring oscillator ( RO ) based PUF with N rows and each row has S inverter stages in each row. A

Fig. 1 shows a ring oscillator (RO) based PUF with N rows and each row has S inverter stages
in each row. A B-bit response is obtained such that one row is chosen as the reference RO and B ROs are
chosen to obtain the response. How many CRP can be produced?
 Fig. 1 shows a ring oscillator (RO) based PUF with N

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