Abstract:
A hybrid ring oscillator (RO)/ arbiter physical unclonable function (PUF) is implemented in a 28-nm CMOS, where two competing ROs accumulate a sufficiently large phase difference exceeding a predefined deadzone (DZ). The resulting eye-opening arbiter (EOA) architecture enables a prediction of PUF bit stability over temperature change (from −40 °C to $125~^{\…