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Reliable and Efficient Chip-PCB Hybrid PUF and Lightweight Key Generator

Yuanzhong XU, Tao KE, Wenjun CAO, Yao FU, Zhangqing HE

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Summary :

Physical Unclonable Function (PUF) is a promising lightweight hardware security primitive that can extract device fingerprints for encryption or authentication. However, extracting fingerprints from either the chip or the board individually has security flaws and cannot provide hardware system-level security. This paper proposes a new Chip-PCB hybrid PUF(CPR PUF) in which Weak PUF on PCB is combined with Strong PUF inside the chip to generate massive responses under the control of challenges of on-chip Strong PUF. This structure tightly couples the chip and PCB into an inseparable and unclonable unit thus can verify the authenticity of chip as well as the board. To improve the uniformity and reliability of Chip-PCB hybrid PUF, we propose a lightweight key generator based on a reliability self-test and debiasing algorithm to extract massive stable and secure keys from unreliable and biased PUF responses, which eliminates expensive error correction processes. The FPGA-based test results show that the PUF responses after robust extraction and debiasing achieve high uniqueness, reliability, uniformity and anti-counterfeiting features. Moreover, the key generator greatly reduces the execution cost and the bit error rate of the keys is less than 10-9, the overall security of the key is also improved by eliminating the entropy leakage of helper data.

Publication
IEICE TRANSACTIONS on Electronics Vol.E106-C No.8 pp.432-441
Publication Date
2023/08/01
Publicized
2023/03/10
Online ISSN
1745-1353
DOI
10.1587/transele.2022ECP5050
Type of Manuscript
PAPER
Category
Electronic Circuits

Authors

Yuanzhong XU
  Hubei Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation Control
Tao KE
  Hubei Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation Control
Wenjun CAO
  Hubei Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation Control
Yao FU
  Hubei Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation Control
Zhangqing HE
  Hubei Key Laboratory of Solar Energy Efficient Utilization and Energy Storage Operation Control

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