US 12,272,657 B2
RRAM filament location for physically unclonable function
Nanbo Gong, White Plains, NY (US); Takashi Ando, Eastchester, NY (US); and Guy M. Cohen, Westchester, NY (US)
Assigned to International Business Machines Corporation, Armonk, NY (US)
Filed by International Business Machines Corporation, Armonk, NY (US)
Filed on Feb. 23, 2022, as Appl. No. 17/652,242.
Prior Publication US 2023/0268292 A1, Aug. 24, 2023
Int. Cl. G06F 21/75 (2013.01); G06F 21/44 (2013.01); H01L 23/00 (2006.01)
CPC H01L 23/573 (2013.01) [G06F 21/44 (2013.01); G06F 21/75 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for system authentication, the method comprising:
subjecting a system to a challenge; and
receiving a response from the system, wherein:
the response is dependent upon a location of depolarized dipoles in a non-volatile memory heat sensing device, and wherein the location of the depolarized dipoles is dependent upon a location of a filament in a resistive random-access memory device of the system, and
the response is a unique identifier.