Patent ID: 11943374
Assignee: VISA INTERNATIONAL SERVICE ASSOCIATION
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 7:
8. A system comprising a server comprising at least one hardware processor, the server being programmed and/or configured to:
identify at least one database transaction that was initiated in response to a request by a user;
receive a first changelog record associated with the at least one database transaction from a target blockchain of at least one changelog blockchain;
determine a public key associated with the user;
attempt a decryption of the first changelog record using the public key;
detect tampering of the target blockchain for the at least one database transaction based on determining that the decryption of the first changelog record has failed; and
restore at least part of the target blockchain with at least part of a verified changelog blockchain based on the tampering of the target blockchain.