US 12,407,526 B2
Cross-certification for secure binding of cryptographic systems
John Robert Gray, Nepean (CA); Michael Ounsworth, Sioux Lookout (CA); and Serge Jean Maurice Mister, Ottawa (CA)
Assigned to Entrust Corporation, Shakopee, MN (US)
Filed by Entrust Corporation, Shakopee, MN (US)
Filed on Dec. 1, 2022, as Appl. No. 18/073,159.
Application 18/073,159 is a continuation in part of application No. 17/344,463, filed on Jun. 10, 2021.
Claims priority of provisional application 63/037,858, filed on Jun. 11, 2020.
Prior Publication US 2023/0093146 A1, Mar. 23, 2023
Int. Cl. H04L 29/06 (2006.01); H04L 9/32 (2006.01)
CPC H04L 9/3268 (2013.01) 19 Claims
OG exemplary drawing
 
1. A computer-implemented method comprising:
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;
generating, at the second certificate authority, a cross certificate and embedding the attribute unique to the first certificate authority as a certificate extension within the cross certificate;
signing the cross certificate with a key associated with the second certificate authority;
sending, from the second certificate authority to the first certificate authority, a second cross certificate request including an attribute unique to the second certificate authority; and
receiving a second cross certificate having embedded therein the attribute unique to the second certificate authority as a certificate extension within the second cross certificate, the second cross certificate being signed with a key associated with the first certificate authority.