US Patent Issued to Bundesdruckerei on Dec. 23 for "Revocation of cryptographic keys by way of a blockchain-based banknote" (German Inventor)

ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,505,434, issued on Dec. 23, was assigned to Bundesdruckerei GmbH (Berlin).

"Revocation of cryptographic keys by way of a blockchain-based banknote" was invented by Florian Peters (Berlin).

According to the abstract* released by the U.S. Patent & Trademark Office: "In one embodiment, the method sending a revocation request to the banknote, in response to the revocation request, receiving a cryptogram signed by the banknote, wherein the first cryptogram includes an identification number of the banknote and a revocation confirmation, and forwarding the signed cryptogram to a blockchain server of a blockchain for entering the revocation confirmation of the banknote identified by the iden...