Patent ID: 11902451
Assignee: FUJITSU LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method of signature verification, the method including:
obtaining a message and a signature, the signature generated using a secret key associated with a user, the message including a cross-blockchain transaction designated for being posted on multiple different blockchains;
obtaining an identifier of the user and a string from a block of a blockchain of the multiple different blockchains, wherein the block of the blockchain is signed using the secret key;
obtaining a master public key, the master public key associated with a master private key, the secret key generated based on the master private key; and
verifying the signature using the master public key, the identifier, and the string, wherein the message is posted on each of the multiple different blockchains in response to the signature being verified.