Physical unclonable function using augmented memory for challenge-response hashing

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United States of America Patent

PATENT NO 9787481
SERIAL NO

14838708

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Abstract

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A technique is presented for performing a physical unclonable function (PUF) using an array of SRAM cells. The technique can be viewed as an attempt to read multiple cells in a column at the same time, creating contention that is resolved according to process variation. An authentication challenge is issued to the array of SRAM cells by activating two or more wordlines concurrently. The response is simply the value that the SRAM produces from a read operation when the challenge condition is applied. The number of challenges that can be applied the array of SRAM cells grows exponentially with the number of SRAM rows and these challenges can be applied at any time without power cycling.

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Patent Owner(s)

  • THE REGENTS OF THE UNIVERSITY OF MICHIGAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fu, Kevin Ann Arbor, US 7 96
Holcomb, Daniel E Watertown, US 5 27

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