Implementation of pseudo linear feedback shift register physical unclonable function on silicon

摘要

In this study, we demonstrate the first implementation of a pseudo linear feedback shift register physical unclonable function (PL-PUF) on silicon, and a proposal of the power supply design to obtain fine reproducibility. Unlike SRAM PUFs, a PL-PUF can generate responses without memory cells, and therefore is secure against attacks extracting internal memory values. We design a capturing signal-generation circuit that brings tolerance to the degradation of reproducibility due to supply voltage change, and implement PL-PUF on 65nm CMOS process. Implemented PL-PUF achieves fine reproducibility (μ=1.09-10.52% fractional HD) and uniqueness (μ=49.01-49.56%, σ=5.38-5.77% class-to-class HD, 0.983-0.941 entropy) on silicon.