On the Response Entropy of APUFs

arXiv:2406.19975v1 Announce Type: new
Abstract: A Physically Unclonable Function (PUF) is a hardware security primitive used for authentication and key generation. It takes an input bit-vector challenge and produces a single-bit response, resulting in a challenge-response pair (CRP). The truth table of all challenge-response pairs of each manufactured PUF should look different due to inherent manufacturing randomness, forming a digital fingerprint. A PUF's entropy (the entropy of all the responses, taken over the manufacturing randomness and uniformly selected …

arxiv authentication challenge cs.cr entropy function hardware hardware security input key puf response security single truth vector