The arbiter-PUF with high uniqueness utilizing novel arbiter circuit with Delay-Time Measurement

Physical Unclonable Functions (PUFs) have been proposed to produce tamper-resistant device or create unique identifications of the secure systems. The conventional basic arbiter-PUF was fabricated with 0.18μm CMOS technology, and the uniqueness of generated multi-bit responses was evaluated. The uniqueness is inadequate than expected because some of multi-bit responses are never generated. In this study, we propose a novel arbiter-PUF utilizing a RG-DTM (Response Generation according to Delay Time Measurement) scheme. The uniqueness is evaluated by the standard deviation of the Hamming Distance distribution between generated 256-bit responses. The standard deviation on the proposed PUFs is greatly improved to 8.45 from 31 on the conventional PUFs.