Amplifier Chain XOR PUF: Enhancing Security with Nonlinear Transmission

Afterwards, the Amplifier Chain XOR Physical Unclonable Function (AC-XOR PUF) was proposed for integrating multiple entropy source units and cascading nonlinear transmission [6]. This design utilizes amplifier units with a gain of approximately 1 for cascading connections, such that process errors at each level can be nonlinearly transmitted to the next level.