Apparatus and method for preventing error in physically unclonable function
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United States of America Patent
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Sep 20, 2016
Grant Date -
Dec 3, 2015
app pub date -
May 17, 2015
filing date -
Jun 2, 2014
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Abstract
An apparatus and method that prevent a bit error in a static random access memory (SRAM)-based Physically Unclonable function (PUF). The method for preventing an error in a PUF includes selecting any value, from a physically unclonable function based on a volatile memory device, as an input value, and checking a response corresponding to the selected input value, classifying cells having a plurality of bits corresponding to the response depending on frequency of error occurrence, calculating a number of white cells, in which an error does not occur, from classified results, and determining whether the number of white cells is greater than a preset threshold number of white cells, and selecting an input value of the physically unclonable function based on results of determination.
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