Presentation Information
[10p-A24-15]Design of Arbiter Physical Unclonable Functions for Superconducting Single Flux Quantum Circuits
〇Eita Makino1, Nobuyuki Yoshikawa1,2,3, Yuki Yamanashi1,2,3 (1.Yokohama National Univ., 2.Yokohama National Univ. IAS, 3.Yokohama National Univ. IMS)
Keywords:
superconducting,physical unclonable function,single flux quantum
This presentation reports on the design and simulation results of an Arbiter Physical Unclonable Function (Arbiter PUF) to prevent device tampering and counterfeiting in high-speed, low-power superconducting single flux quantum (SFQ) circuits. By actively exploiting manufacturing variations and thermal noise-induced jitter, which typically cause malfunctions, we utilize thermal noise-induced output probabilities (analog continuous values) as device-specific unique IDs instead of conventional digital values. This approach increases the amount of information obtained from a single challenge input, eliminates the need for large-scale error correction circuits, and successfully reduces the overall circuit area. Specifically, a circuit utilizing an 8-stage delay line was designed, and simulations were conducted by incorporating 4.2 K thermal noise and component variations based on a normal distribution with a standard deviation of 2%. The results confirmed that distinctly different output probability characteristics were obtained for each individual device, demonstrating the viability of the proposed method as an effective device identification technique utilizing analog probability values.