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:
Apr. 04, 2017
Filed:
Apr. 11, 2015
Applicant:
Guardtime Ip Holdings, Ltd., Tortola, VG;
Inventors:
Assignee:
GUARDTIME IP HOLDINGS, LTD., Tortola, VG;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/32 (2006.01);
U.S. Cl.
CPC ...
H04L 9/3247 (2013.01); H04L 9/321 (2013.01); H04L 9/3239 (2013.01); H04L 9/3263 (2013.01); H04L 9/3297 (2013.01); H04L 2209/24 (2013.01); H04L 2209/38 (2013.01); H04L 2209/64 (2013.01); H04L 2209/72 (2013.01);
Abstract
A digital message is signed and, if a request is approved, receives a time stamp. The request is computed as a first function of the message and a current one of a sequence of passwords computed such that each password corresponds to an index unit. Each of the passwords may be computed as a function, such as a hash function, pseudo-random function, or encryption function, of the subsequent password, whereby the sequence terminates with an initial password that forms a public key parameter for the password sequence. At least one hash tree uses at least a subset of the passwords as inputs to a hash tree used to verify the passwords.