Techniques and mechanisms to detect and compensate for drift by a physically uncloneable function (PUF) circuit. In an embodiment, first state information is registered as reference information to be made available for subsequent evaluation of whether drift by PUF circuitry has occurred. The first state information is associated with a first error correction strength. The first state information is generated based on a first PUF value output by the PUF circuitry. In another embodiment, second state information is determined based on a second PUF value that is output by the PUF circuitry. An evaluation of whether drift has occurred is performed based on the first state information and the second state information, the evaluation including determining whether a threshold error correction strength is exceeded concurrent with a magnitude of error being less than the first error correction strength.
Hamlet, Jason. "Method, apparatus and system to compensate for drift by physically unclonable function circuitry." US 9,501,664, United States Patent and Trademark Office, Nov. 2016.
Hamlet, Jason, "Method, apparatus and system to compensate for drift by physically unclonable function circuitry," US 9,501,664, issued November 21, 2016.
@misc{osti_1333217,
author = {Hamlet, Jason},
title = {Method, apparatus and system to compensate for drift by physically unclonable function circuitry},
annote = {Techniques and mechanisms to detect and compensate for drift by a physically uncloneable function (PUF) circuit. In an embodiment, first state information is registered as reference information to be made available for subsequent evaluation of whether drift by PUF circuitry has occurred. The first state information is associated with a first error correction strength. The first state information is generated based on a first PUF value output by the PUF circuitry. In another embodiment, second state information is determined based on a second PUF value that is output by the PUF circuitry. An evaluation of whether drift has occurred is performed based on the first state information and the second state information, the evaluation including determining whether a threshold error correction strength is exceeded concurrent with a magnitude of error being less than the first error correction strength.},
url = {https://www.osti.gov/biblio/1333217},
place = {United States},
year = {2016},
month = {11},
note = {US Patent
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