US 11,997,221 B2
Digital certificate and method for securely providing a public key
Evangelos Karatsiolis, Darmstadt (DE)
Assigned to MTG AG, Darmstadt (DE)
Appl. No. 17/598,553
Filed by MTG AG, Darmstadt (DE)
PCT Filed Feb. 10, 2020, PCT No. PCT/EP2020/053357
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/192996, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 10 2019 107 932.2 (DE), filed on Mar. 27, 2019.
Prior Publication US 2022/0200812 A1, Jun. 23, 2022
Int. Cl. H04L 29/06 (2006.01); H04L 9/32 (2006.01)
CPC H04L 9/3268 (2013.01) [H04L 9/3236 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A digital certificate (1) for use in a public key infrastructure,
wherein the digital certificate (1) contains certificate holder information (2) and certificate key information (3), and
wherein the digital certificate (1) is signed by a certificate authority with a digital certificate signature (4) with which the certificate holder information (2) and the certificate key information (3) are signed,
wherein the digital certificate (1) comprises at least one piece of resource identification information (5) relating to a first digitally contactable resource (17) via which at least one public key (13) can be retrieved,
wherein the digital certificate (1) comprises a certificate key hash value (6) which is assigned to the at least one public key (13) retrievable via the at least one resource (17), and
wherein the digital certificate signature (4) also signs the certificate key hash value (6).