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

Claim 17:
18. A method for issuing a digital certificate by an issuing device, the method comprising:
responding, by the issuing device, to a challenge request received from a requesting device by transmitting challenge information comprising a cryptographic challenge to the requesting device;
responding, by the issuing device, to a certification request received from the requesting device, the certification request comprising a public key and ownership information of the public key;
issuing the digital certificate certifying the ownership information of the public key; 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 a ledger of a distributed database,
wherein the ownership information comprises counterparty identity information relating to the ledger of the distributed database, and
wherein the digital certificate is issued under condition that the issuing device successfully verifies that:
a cryptographic response to the cryptographic challenge has been posted to the ledger of the distributed database;
the cryptographic response is associated, in the ledger, with the counterparty identity information included in the ownership information of the certification request; and
the cryptographic response constitutes a valid proof of ownership of the public key.