US 12,463,835 B2
Method for generating a physical unclonable function response
Benjamin Duval, Saint Maximin (FR); Alexandre Berzati, Fuveau (FR); and Olivier Fourquin, Fuveau (FR)
Assigned to THALES DIS FRANCE SAS, Meudon (FR)
Appl. No. 18/037,450
Filed by THALES DIS FRANCE SAS, Meudon (FR)
PCT Filed Nov. 17, 2021, PCT No. PCT/EP2021/082036
§ 371(c)(1), (2) Date May 17, 2023,
PCT Pub. No. WO2022/106491, PCT Pub. Date May 27, 2022.
Claims priority of application No. 20306405 (EP), filed on Nov. 18, 2020.
Prior Publication US 2023/0344656 A1, Oct. 26, 2023
Int. Cl. H04L 9/32 (2006.01); H03K 19/17768 (2020.01)
CPC H04L 9/3278 (2013.01) [H03K 19/17768 (2013.01); H04L 2209/12 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for generating a physical unclonable function (PUF) response by a PUF circuit of an electronic device,
said PUF circuit comprising pairs of electronic components called PUF primitives implementing said physical unclonable function and, for each PUF primitives pair, a comparator having as inputs electrical characteristic values of the PUF primitives of said PUF primitive pair, and configured for generating an analog differential value υ−T with υ a difference between said electrical characteristic values and T a non-zero current offset of said comparator, performing an analog to digital conversion of said analog differential value υ−T, and outputting a PUF output bit equal to the result of said analog to digital conversion,
said method comprising:
obtaining a challenge (S1),
generating PUF output bits (S2) by applying said physical unclonable function to said obtained challenge, and
generating said PUF response (S3) from said generated PUF output bits verifying υ>δυ+|T| or υ<−δυ−|T| with δυ a predetermined threshold.