Patent ID: 11917081
Assignee: SIEMENS AKTIENGESELLSCHAFT
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 18:
19. A method for requesting a digital certificate by a requesting device, the method comprising:
transmitting, by the requesting device, a challenge request to an issuing device;
receiving, by the requesting device, challenge information comprising a cryptographic challenge from the issuing device;
creating, by the requesting device using a private key of a cryptographic key pair, a cryptographic response to the cryptographic challenge, the cryptographic response constituting a valid proof of ownership of a public key of the cryptographic key pair;
posting, by the requesting device, the created cryptographic response to a ledger of a distributed database such that the posted cryptographic response is associated therein with counterparty identity information of the requesting device;
creating a certification request comprising the public key and ownership information of the public key of the cryptographic key pair, wherein the ownership information comprises the counterparty identity information of the requesting device;
transmitting the certification request to the issuing device;
receiving an issued digital certificate certifying the ownership information of the public key from the issuing device; and
providing administrative privileges to a server entity to an owner of the public key having the digital certificate; or
preventing access administrative privileges of the server entity when a digital footprint of a rogue digital certificate does not match with the digital certificate posted to the ledger of the distributed database.