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. 09, 2026
Filed:
May. 27, 2022
Applicant:
Verisign, Inc., Reston, VA (US);
Inventors:
Andrew Fregly, Reston, VA (US);
Joseph Harvey, Clifton, VA (US);
Burton S. Kaliski, Jr., McLean, VA (US);
Assignee:
VeriSign, Inc., Reston, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L 61/4511 (2022.01); H04L 9/40 (2022.01); H04L 61/58 (2022.01); H04L 69/164 (2022.01);
U.S. Cl.
CPC ...
H04L 61/4511 (2022.05); H04L 61/58 (2022.05); H04L 63/0485 (2013.01); H04L 69/164 (2013.01);
Abstract
A method for use by a Domain Name System (DNS) resolver includes: obtaining a first identifier that the DNS resolver associates with cache data, the cache data comprising at least a portion of one or more DNS resource records; receiving or obtaining a second identifier that an DNS nameserver associates with current data; determining whether the first identifier corresponds to the second identifier; and performing an action to maintain or update the cache data based on whether the first identifier corresponds to the second identifier.