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:
Jun. 03, 2025
Filed:
Jan. 11, 2021
Applicant:
Cryptography Research, Inc., San Jose, CA (US);
Inventors:
Scott C. Best, Palo Alto, CA (US);
Matthew E. Orzen, San Francisco, CA (US);
Assignee:
Cryptography Research, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/40 (2022.01); G06F 21/44 (2013.01);
U.S. Cl.
CPC ...
H04L 63/0853 (2013.01); G06F 21/44 (2013.01); G06F 2221/2103 (2013.01);
Abstract
A first device transmits a first message to a second device as part of a challenge-response protocol in order to authenticate the second device. A power limited power supply coupled to the second device limits power consumption by the second device during the second device's challenge-response protocol calculations. The first device measures a response time of the second device during the challenge-response protocol. The authentication of the second device is based on the response time of the second device while it has limited power consumption.