| Abstract: 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. |
| Filed: 12/15/2014 |
| Application Number: 14/570704 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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