BLOCKCHAIN SYSTEM THAT INCLUDES BANK NODES EACH HAVING SEPARATE LEDGERS FOR IDENTITY, DIGITAL CURRENCY AND OTHER FUNCTIONS, AND OPERATION METHOD THEREOF

摘要

A blockchain system (100) is disclosed. The blockchain system (100) includes bank nodes (200-1, ..., 200-4) and mobile nodes (300-1, 300-2), and each of the bank nodes (200-1, ..., 200-4) includes an identity ledger (210) that includes a public key (PuKl, PuK3, PuK3, PuK4) of each of the bank nodes (200-1, ..., 200-4), a digital ID (DID1, ..., DID4) for identifying an identity of a user of each of the bank nodes (200-1, ..., 200-4), a public key (PuKml, PuKm2) of each of the mobile nodes (300-1, 300-2), and a digital ID (DIDml, DIDm2) for identifying an identity of each of the mobile nodes (300-1, 300-2).