Reconfigurable ring oscillator (RO) physical unclonable function (PUF)
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United States of America
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Mar 18, 2025
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app pub date -
Oct 25, 2023
filing date -
Oct 25, 2023
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Abstract
Provided is a reconfigurable Ring Oscillator (RO) Physical Unclonable Function (PUF), which comprises a NAND gate with a first input line and a second input line and a series of inverters with at least one memory cell placed between two inverters of the series of inverters, where an output of a last inverter provides input to the second input line, and where the memory cell comprises a Field Effect Transistor (FET). In addition, the reconfigurable RO PUF comprises a frequency counter, where the output of the last inverter provides input to the frequency counter. In normal operation mode, the first input line is on to enable ring oscillation and the FET is off. In reconfiguration mode, the first input line is off and the FET is on to enable reconfiguration.
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