Uniformity optimization method for arbiter physically unclonable functions

In recent years, hardware encryption based on physically unclonable functions (PUFs) has increased in significance in information security. In general, a PUF is evaluated by three indicators: reliability, uniqueness, and uniformity. In this paper, the arbitrator PUF is mainly studied, and a uniformity adjustment scheme is proposed. The main idea of this scheme is to add an adjustment module to the original circuit and construct an algorithm that automatically sets the adjustment signal according to the response. Finally, we use FPGAs to test the uniformity, reliability, and uniqueness of the adjusted PUF.K.