Electronic physical unclonable functions
AssigneeLewis Innovative Technologies
InventorsJames M Lewis, Dane R Walther, Paul H Horn
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Abstract
An electronic asymmetric unclonable function applied to an electronic system being evaluated includes an electronic system and an AUF array electronically associated with the electronic system. The AUF array includes a plurality of non-identical cells. Each of the non-identical cells includes a test element representing a characteristic of the electronic system being evaluated and a measurement device evaluating the test element. A comparison unit processes an output of the measurement device to provide a multi-bit output value representing a magnitude of differences.
Claims1
An unclonable function, comprising:
- a plurality of ring oscillator structures, each ring oscillator structure including a multiplexer, an inverter, groups of delay elements, a binary counter, and routing resources;
- and
- a comparison unit to which output of each binary counter of the plurality of ring oscillator structures is routed wherein output of the comparison unit is a multi-bit value.
Dependencies are inferred from the claim text.