SYSTEMS AND METHODS FOR GENERATING PHYSICALLY UNCLONABLE FUNCTIONS FROM NON-VOLATILE MEMORY CELLS

摘要

This disclosure describes techniques for generating physically unclonable functions (PUF) from non-volatile memory cells. The PUFs leverage resistance variations in non-volatile memory cells. Resistance variations in array of non-volatile memory cells may be produce a bitstring during an enrollment process. The bitstring may be stored in the non-volatile memory array. Regeneration may include retrieving the bitstring from the non-volatile memory array.

主权项

1. A method for generating a physically unclonable bitstring, the method comprising:
programming cells in the memory array to a first state; for each of a plurality of cells in the memory array, determining a value corresponding to a respective analog entropy source; determining an approximate median value corresponding to the respective values; programming cells in the memory array having a value greater than the approximate median value to a second state; and generating a bitstring by reading the states of cells in the memory array.