US 11,968,317 B2
Security device including physical unclonable function cells, operation method of security device, and operation method of physical unclonable function cell device
Seungwon Lee, Yongin-si (KR)
Assigned to Samsung Electronics Co., Ltd., (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on May 18, 2023, as Appl. No. 18/319,871.
Application 18/319,871 is a division of application No. 16/994,078, filed on Aug. 14, 2020, granted, now 11,695,577.
Claims priority of application No. 10-2019-0138808 (KR), filed on Nov. 1, 2019.
Prior Publication US 2023/0299982 A1, Sep. 21, 2023
Int. Cl. H04L 9/32 (2006.01); G06F 21/75 (2013.01); H04L 9/08 (2006.01)
CPC H04L 9/3278 (2013.01) [G06F 21/75 (2013.01); H04L 9/0877 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An operation method of a physical unclonable function (PUF) cell device including a plurality of PUF cells, the method comprising:
selecting a first target PUF cell of the plurality of PUF cells;
applying a first voltage to a first word line connected with the first target PUF cell;
generating a first target value based on a first target current corresponding to the first target PUF cell and generating a first central value based on a first sum current corresponding to a sum of first currents output from first PUF cells, connected with the first word line, of the plurality of PUF cells;
determining a first target bit of the first target PUF cell based on the first target value and the first central value; and
generating a security key based on the first target bit for responding to an authentication request.