The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2023
Filed:
Apr. 02, 2021
Arizona Board of Regents on Behalf of Northern Arizona University, Flagstaff, AZ (US);
Bertrand F Cambou, Flagstaff, AZ (US);
ARIZONA BOARD OF REGENTS ON BEHALF OF NORTHERN ARIZONA UNIVERSITY, Flagstaff, AZ (US);
Abstract
Systems and methods for symmetric encryption between a client and a server device include a client device having an array of physical unclonable function devices and a server device storing information sufficient to reconstruct responses of the devices to an applied stimulus such as varying levels of electrical current. The server shares a challenge with the client, which measures characteristics such as electrical resistances for a subset of the devices according to instructions extracted from the challenge. The client measures a corresponding reference device in the array for each device of the subset and assigns a value determined based on a comparison of each device with the corresponding reference device to generate a cryptographic key. The server calculates an expected response of the client to the challenge according to a model of the devices in the array, and uses the calculated response to generate the key independently.