Abstract
Abstract Aiming at the lack of reliability and uniqueness of the traditional configurable ring oscillator physical unclonable function (RO-PUF) due to the simple configurable path, a configurable RO-PUF is proposed based on the delay characteristics of the ring oscillator. The design scheme redesigned the RO structure, making the configurable path of the RO-PUF more flexible and increasing the number of incentive response pairs (CRPs); At the same time, the introduction of a lightweight SPONGENT hash algorithm in the RO-PUF structure makes the mapping between incentives and responses more complicated, prevents attackers from building model attacks by acquiring CRPs, and enhances RO-PUF security. And then, the design scheme is implemented on Xilinx’s Spartan series FPGA chip, and the experimental results are compared and analyzed. The results show that the configurable RO-PUF designed with this scheme has an average reliability of 98.87% and uniqueness of 49.13%.
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