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A Unified PUF and Crypto Core Exploiting the Metastability in Latches

Author

Listed:
  • Ronaldo Serrano

    (Department of Computer and Network Engineering, The University of Electro-Communications (UEC), Tokyo 182-8585, Japan)

  • Ckristian Duran

    (Department of Computer and Network Engineering, The University of Electro-Communications (UEC), Tokyo 182-8585, Japan)

  • Marco Sarmiento

    (Department of Computer and Network Engineering, The University of Electro-Communications (UEC), Tokyo 182-8585, Japan)

  • Tuan-Kiet Dang

    (Department of Computer and Network Engineering, The University of Electro-Communications (UEC), Tokyo 182-8585, Japan)

  • Trong-Thuc Hoang

    (Department of Computer and Network Engineering, The University of Electro-Communications (UEC), Tokyo 182-8585, Japan)

  • Cong-Kha Pham

    (Department of Computer and Network Engineering, The University of Electro-Communications (UEC), Tokyo 182-8585, Japan)

Abstract

Hardware acceleration of cryptography algorithms represents an emerging approach to obtain benefits in terms of speed and side-channel resistance compared to software implementations. In addition, a hardware implementation can provide the possibility of unifying the functionality with some secure primitive, for example, a true random number generator (TRNG) or a physical unclonable function (PUF). This paper presents a unified PUF-ChaCha20 in a field-programmable gate-array (FPGA) implementation. The problems and solutions of the PUF implementation are described, exploiting the metastability in latches. The Xilinx Artix-7 XC7A100TCSG324-1 FPGA implementation occupies 2416 look-up tables (LUTs) and 1026 flips-flops (FFs), reporting a 3.11% area overhead. The PUF exhibits values of 49.15%, 47.52%, and 99.25% for the average uniformity, uniqueness, and reliability, respectively. Finally, ChaCha20 reports a speed of 0.343 cycles per bit with the unified implementation.

Suggested Citation

  • Ronaldo Serrano & Ckristian Duran & Marco Sarmiento & Tuan-Kiet Dang & Trong-Thuc Hoang & Cong-Kha Pham, 2022. "A Unified PUF and Crypto Core Exploiting the Metastability in Latches," Future Internet, MDPI, vol. 14(10), pages 1-12, October.
    • Handle: RePEc:gam:jftint:v:14:y:2022:i:10:p:298-:d:944283
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    Keywords

    ChaCha20; PUF; RISC-V;
    All these keywords.

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