CMOS Silicon Physical Unclonable Functions Based on Intrinsic Process Variability

This paper presents an extreme-low-power mixed-signal CMOS integrated circuit for product identification and anti-counterfeiting, which implements a physical unclonable function operating with a challenge-response scheme. We devise a series of circuits and algorithmic solutions based on the use of a process monitor and on the prediction of the erratic response bits which allow to suppress the effects of temperature, voltage supply and process variations in order to obtain a robust and reliable behavior.