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Title:
32-bit and 64-bit CDC-7-XPUF Implementation on a Zynq-7020 SoC
Authors: Oğuz Yayla, Yunus Emre Yılmaz
Abstract:Physically (Physical) Unclonable Functions (PUFs) are basic and useful primitives in designing cryptographic systems. PUFs are designed to facilitate device authentication, secure boot and firmware integrity, and secure communications. To achieve these objectives, PUFs must exhibit both consistent repeatability and instance-specific randomness. The Arbiter PUF, recognized as the first silicon PUF, is capable of generating a substantial number of secret keys instantaneously based on the input, all while maintaining a lightweight design. This advantageous characteristic makes it particularly well-suited for device authentication in applications with constrained resources, especially for Internet-of-Things (IoT) devices. Despite these advantages, arbiter PUFs are vulnerable to machine learning attacks. Hence, those arbiter PUF designs are improved to achieve increased resistance against such attacks. In this work, a machine-learning-resistant 32-bit and 64-bit component-differentially challenged XOR Arbiter PUF (CDC-XPUF) is implemented based on a design found in the literature. The system is implemented using the ZC702 Rev1.1 Evaluation Board, which features the Xilinx Zynq 7020 SoC, and utilizes a configuration involving three boards for experimental validation. The 32-bit and 64-bit 7-stream CDC-7-XPUFs are evaluated using PUF metrics in the literature, and the utilization ratio of both implementations is also presented. These improvements aim to increase resilience against machine learning attacks while maintaining usefulness and efficiency for IoT applications.
ePrint: https://eprint.iacr.org/2024/1443
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