公开(公告)号：US20240204803A1

公开(公告)日：2024-06-20

申请号：US18084974

申请日：2022-12-20

Applicant: Xilinx, Inc.

Inventor： James Wesselkamper

IPC: H03M13/25 ,  H03M13/11

CPC classification number: H03M13/256 ,  H03M13/1111

Abstract: A physically unclonable function includes a circuit that translates a normally distributed sequence of raw sample into a sequence of uniformly distributed binned values across sub-bins of bins. Helper circuitry generates centering values and parity bits based on binned values generated during registration. Each centering value is associated with a raw sample value corresponding to a binned value and indicates an offset of a sub-bin in one of the bins. A distance calculator generates a set of distances from each raw sample value based on the centering value associated with the raw sample value. Each distance indicates a difference between the respective raw sample value and a raw sample value equivalent to a midpoint of a sub-bin offset by the associated centering value in a bin. A trellis decoder generates a PUF signature based on the candidate symbols, sets of distances, and parity bits.

公开(公告)号：US12081238B2

公开(公告)日：2024-09-03

申请号：US18084974

申请日：2022-12-20

Applicant: Xilinx, Inc.

Inventor： James Wesselkamper

IPC: H03M13/25 ,  H03M13/11

CPC classification number: H03M13/256 ,  H03M13/1111

Abstract: A physically unclonable function includes a circuit that translates a normally distributed sequence of raw sample into a sequence of uniformly distributed binned values across sub-bins of bins. Helper circuitry generates centering values and parity bits based on binned values generated during registration. Each centering value is associated with a raw sample value corresponding to a binned value and indicates an offset of a sub-bin in one of the bins. A distance calculator generates a set of distances from each raw sample value based on the centering value associated with the raw sample value. Each distance indicates a difference between the respective raw sample value and a raw sample value equivalent to a midpoint of a sub-bin offset by the associated centering value in a bin. A trellis decoder generates a PUF signature based on the candidate symbols, sets of distances, and parity bits.