INTEGRATED CIRCUIT INCLUDING A PHYSICALLY UNCLONABLE FUNCTION DEVICE AND CORRESPONDING METHOD FOR IMPLEMENTING A PHYSICALLY UNCLONABLE FUNCTION
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United States of America
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Apr 3, 2025
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Dec 12, 2024
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Dec 12, 2024
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Abstract
Unclonable function circuitry includes a plurality of pairs of phase-change memory cells in a virgin state, and sensing circuitry coupled to the plurality of pairs of phase-change memory cells in the virgin state. The sensing circuitry identifies a subset of the plurality of pairs of phase-change memory cells in the virgin state based on a reliability mask. Signs of differences of effective resistance values of the identified subset of the plurality of pairs of phase-change memory cells in the virgin state are sensed by the sensing circuitry. The sensing circuitry generates a string of bits based on the sensed signs of differences in the effective resistance values of the identified subset of the plurality of pairs of phase-change memory cells in the virgin state. Processing circuitry coupled to the unclonable function circuitry, in operation, executes one or more operations using the generated string of bits.
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