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:
May. 10, 2022
Filed:
Jun. 01, 2019
Applicant:
Guardtime SA, Lausanne, CH;
Inventor:
Henri Lakk, Tartu, EE;
Assignee:
Guardtime SA, Lausanne, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/32 (2006.01); G06F 16/907 (2019.01); H04L 9/06 (2006.01);
U.S. Cl.
CPC ...
H04L 9/3247 (2013.01); G06F 16/907 (2019.01); H04L 9/0643 (2013.01); H04L 9/3213 (2013.01); H04L 9/3297 (2013.01); H04L 2209/38 (2013.01);
Abstract
A log, comprising a sequence of temporally ordered digital entries, is authenticated by entering a new entry into the log only after expiration of a minimum time interval. A digital signature and timestamp are generated for each entry in the log and are included in each respective entry. In a validity verification phase, the timestamp of at least one of the entries is examined to determine whether it indicates entry into the log at a time relative to a preceding entry in the log after less than an expected minimum time interval. If so, a remedial action is taken.