Method, apparatus and system to compensate for drift by physically unclonable function circuitry
| DWPI Title: Apparatus for compensating drift in facial data by physically unclonable function circuitry, has evaluation circuit for performing signal registration of update to reference information based on other physically unclonable function value |
| 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. |
| Use: Apparatus for compensating drift in a source of biometric information i.e. facial recognition data, by PUF circuitry. |
| Advantage: The apparatus facilitates compensation for drift of biometric data sources that can be useful to automatically accommodate changes in facial recognition data, which slowly increase as a person grows older. The apparatus stores Q1 to allow for secure recovery and use of P1 even after drift of PUF circuit has resulted in the first error correction strength being exceeded. |
| Novelty: The apparatus has an evaluation circuit for determining whether a threshold error correction strength is exceeded concurrent with a magnitude of error less than an error correction strength to detect a physically uncloneable function (PUF) circuitry's drift. The circuit performs signal calculation of a value representing a combination of the PUF value and another PUF value generated by the circuitry subsequent to the PUF value, and a signal registration of an update to reference information based on the other PUF value, where the update enrols the value to enable a recovery of the PUF value. |
| Filed: 12/15/2014 |
| Application Number: US14570704A |
| Tech ID: SD 12218.0 |
| 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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