Patent ID: 9032476
Filing Date: 2015-05-12
Classification: B82Y,G06F,H01L,H04L

Abstract:
1. An authentication token device, comprising: a hardware public physically unclonable function that includes operational characteristics characterized by publicly available parameters, wherein the parameters are affected by unintentional manufacturing variability of the hardware public physically unclonable function; an input register configured to load signals into the hardware public physically unclonable function at an input time, wherein the signals are propagated through the hardware public physically unclonable function so as to transform the signals in accordance with the unintentional manufacturing variability of the hardware public physically unclonable function; and an output register configured to sample the transformed signals from the hardware public physically unclonable function at a specified time after the input time, wherein the transformed signals during the specified time differ from other transformed signals sampled at another time due to the unintentional manufacturing variability.