Patent ID: 11967376
Assignee: CROSSBAR, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 13:
14. A method for operating a memory device, comprising:
select a never-programmed resistive switching device on a semiconductor die for a physical unclonable feature (PUF) write operation;
apply a sub-program signal to the never-programmed resistive switching device, wherein the sub-program signal is insufficient to cause a state transition for the never-programmed resistive switching device;
sense a response signal of the never-programmed resistive switching device to the sub-program signal;
compare the response signal to a stored metric of a native electrical characteristic of the never-programmed resistive switching device utilized for determining a value of a PUF number associated with the PUF write operation;
determine the value in response to the comparison; and
associate the determined value of the PUF number with the response signal of the never-programmed resistive switching device.