US 12,014,534 B2
Printed physical unclonable function patterns
Yujie Zhu, Mississauga (CA); Warren Jackson, San Francisco, CA (US); Ethan Shen, Toronto (CA); and Biby Esther Abraham, Mississauga (CA)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by Xerox Corporation, Norwalk, CT (US); and Palo Alto Research Center Incorporated, Palo Alto, CA (US)
Filed on Apr. 12, 2021, as Appl. No. 17/227,685.
Prior Publication US 2022/0324243 A1, Oct. 13, 2022
Int. Cl. G06V 10/75 (2022.01); G06F 18/00 (2023.01); G06K 1/12 (2006.01); G06K 19/06 (2006.01); H04L 9/32 (2006.01)
CPC G06V 10/757 (2022.01) [G06F 18/00 (2023.01); G06K 1/121 (2013.01); G06K 19/06028 (2013.01); G06K 19/06037 (2013.01); G06V 10/751 (2022.01); H04L 9/3278 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method, comprising:
applying a clear coat layer on a substrate;
drying the clear coat layer to form random microstructures in the clear coat layer;
dispensing a printing fluid to print a graphical pattern on the clear coat layer, wherein the graphical pattern comprises a bar code, a quick response code, or a pattern of shapes; and
generating a physical unclonable function (PUF) pattern by drying the printing fluid that fills the random microstructures formed in the clear coat layer.