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:
Aug. 12, 2025
Filed:
Jun. 10, 2021
Entrust Corporation, Shakopee, MN (US);
John Robert Gray, Nepean, CA;
Michael Ounsworth, Sioux Lookout, CA;
Serge Jean Maurice Mister, Ottawa, CA;
Entrust Corporation, Shakopee, MN (US);
Abstract
Methods and systems for cross-certification to bind together two cryptographic systems are disclosed. One method includes receiving, from a first certificate authority at a second certificate authority, a cross certificate request, the cross certificate request including an attribute unique to the first certificate authority. The method also includes calculating a signature at the second certificate authority based at least in part on the attribute, and calculating a hash value based on a combination of the signature calculated at the second certificate authority and a key associated with the second certificate authority. The method includes generating a cross certificate and embedding the hash value as a certificate extension within the cross certificate.