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:
Nov. 23, 2021
Filed:
Dec. 17, 2019
Applicant:
Guardtime SA, Lausanne, CH;
Inventors:
Henri Lakk, Tartu, EE;
Ahto Truu, Tartu, EE;
Assignee:
Guardtime SA, Lausanne, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); H04L 9/32 (2006.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01);
U.S. Cl.
CPC ...
H04L 9/3247 (2013.01); H04L 9/085 (2013.01); H04L 9/30 (2013.01); H04L 9/3242 (2013.01);
Abstract
During a period of uni-directional, device-to-collector communication, a digital signature is created for at least one data set based on a public key, which is computed from at least one time-bound secret key. When collector-to-device communication becomes available, the collector signals to the device that the current data collection period may end, at which point the time-bound secret key(s) previously used may be revealed but are not longer usable.