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This paper proposes a 3-input arbiter-based novel physically unclonablefunction (PUF) design. Firstly, a 3-input priority arbiter is designed using asimple arbiter, two multiplexers (2:1), and an XOR logic gate. The priorityarbiter has an equal probability of 0's and 1's at the output, which results inexcellent uniformity (49.45%) while retrieving the PUF response. Secondly, anew PUF design based on priority arbiter PUF (PA-PUF) is presented. The PA-PUFdesign is evaluated for uniqueness, non-linearity, and uniformity against thestandard tests. The proposed PA-PUF design is configurable inchallenge-response pairs through an arbitrary number of feed-forward priorityarbiters introduced to the design. We demonstrate, through extensiveexperiments, reliability of 100% after performing the error correctiontechniques and uniqueness of 49.63%. Finally, the design is compared with theliterature to evaluate its implementation efficiency, where it is clearly foundto be superior compared to the state-of-the-art.

PA-PUF: A Novel Priority Arbiter PUF