PUF Group with Dynamically Shared Entropy

The traditional physical unclonable function (PUF) based authentication model is performed through a challenge-response pair (CRP) dataset, which is difficult to meet the requirements of N-party authentication. This paper introduces a new variant of the PUF group with shared entropy, which enables decentralized authentication through multiple PUFs that yield the same response. The proposed PUF group design employs a dual linear feedback shift register (LFSR) to generate inter-group unique dynamic responses. In the proposed structure, the Weak PUF entropy source provides a random initial vector of LFSRs, and the output of the LFSRs undergoes processing using a one-way nonlinear block comprising bent functions. Experimental results demonstrate desirable matching rates for the intra-group responses and high statistical performance for the inter-group responses. The proposed method achieves high levels of randomness and attack resistance with low hardware overhead, which indicates its suitability for secure and scalable N-party authentication scenarios.

The traditional physical unclonable function (PUF) based authentication model is performed through a challenge-response pair (CRP) dataset, which is difficult to meet the requirements of N-party authentication. This paper introduces a new variant of the PUF group with shared entropy, which enables decentralized authentication through multiple PUFs that yield the same response. The proposed PUF group design employs a dual linear feedback shift register (LFSR) to generate inter-group unique dynamic responses. In the proposed structure, the Weak PUF entropy source provides a random initial vector of LFSRs, and the output of the LFSRs undergoes processing using a one-way nonlinear block comprising bent functions. Experimental results demonstrate desirable matching rates for the intra-group responses and high statistical performance for the inter-group responses. The proposed method achieves high levels of randomness and attack resistance with low hardware overhead, which indicates its suitability for secure and scalable N-party authentication scenarios.