Chip authentication using scan chains

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9069989
APP PUB NO 20130198873A1
SERIAL NO

13360267

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Abstract

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Methods and systems for generating a circuit identification number include determining a propagation time delay across a scan chain of known length; comparing the propagation time delay to a threshold associated with the scan chain length; storing an identifier bit based on the result of the comparison; repeating the steps of determining, comparing, and storing until a number of stored identifier bits reaches a threshold number; and outputting the stored identifier bits.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Motika, Franco Hopewell Junction, US 136 3628
Pfeiffer, Dirk Croton on Hudson, US 119 1653
Song, Peilin Lagrangeville, US 90 720

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