METHOD AND SYSTEM FOR PERFORMING PHYSICAL UNCLONABLE FUNCTION GENERATED BY NON-VOLATILE MEMORY WRITE DELAY DIFFERENCE

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

16/729,512

專利證號

US 11,057,224

專利獲證名稱

METHOD AND SYSTEM FOR PERFORMING PHYSICAL UNCLONABLE FUNCTION GENERATED BY NON-VOLATILE MEMORY WRITE DELAY DIFFERENCE

專利所屬機關 (申請機關)

國立清華大學

獲證日期

2021/07/06

技術說明

A method for performing a physical unclonable function generated by a non-volatile memory write delay difference includes a resetting step, a writing step, a detecting step, a terminating step and a write-back operating step. The resetting step includes resetting two non-volatile memory cells controlled by a bit line and a bit line bar, respectively. The writing step includes performing a write operation on each of the two non-volatile memory cells. The detecting step includes detecting a voltage drop of each of the bit line and the bit line bar, and comparing the voltage drop and a predetermined voltage difference value to generate a comparison flag. The terminating step includes terminating the write operation on one of the two non-volatile memory cells according to the comparison flag. The write-back operating step includes performing a write-back operation on another of the two non-volatile memory cells.

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