Physically unclonable function based on a phase change material array

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United States of America Patent

PATENT NO 12099616
APP PUB NO 20230153444A1
SERIAL NO

17454832

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Abstract

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In an approach to a implementing a PUF based on a PCM array, for each PCM device in an array of PCM devices, the PCM device is reset to an initial state. A first conductance of the PCM device is measured. A predetermined number of partial set pulses is applied to the PCM device. A second conductance of the PCM device is measured. Responsive to determining that the second conductance is greater than the first conductance multiplied by a factor, a PUF value of the PCM device is set to logical “1”. Responsive to determining that the second conductance is less than the first conductance multiplied by a factor, a PUF value of the PCM device is set to logical “0”. The PUF value of the PCM device is added to an overall PUF string for the array of PCM devices.

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Patent Owner(s)

Patent OwnerAddress
INTERNATIONAL BUSINESS MACHINES CORPORATIONNEW ORCHARD ROAD ARMONK NY 10504

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ando, Takashi Eastchester, US 736 6423
Cohen, Guy M Westchester, US 195 2507
Gong, Nanbo White Plains, US 48 48

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