Silicon Physical Unclonable Function resistant to a 10²⁵-trial brute force attack in 90 nm CMOS

A CMOS 90 nm physical unclonable function (PUF) based on analog signal processing and process variability has been realized, resistant to a brute force attack of more than 10²⁵ trials. Experimental measurements show that the circuit exhibits 38 µW power consumption. Process and temperature monitor and compensator keep the experimental BER below 0.1% at 125°C or with a 10% VDD variation, with excellent accelerated aging behavior.