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

Claim 5:
6. A non-transitory computer-readable medium having encoded therein programing code executable by a processor to perform operations comprising:
receiving an identifier associated with a user;
generating a first secret key based on the identifier;
directing that a string and the identifier be posted on a first block of a first blockchain;
directing that the string and the identifier be posted on a second block of a second blockchain;
generating a second secret key using the string, the first secret key, and the identifier;
signing the first block that includes the string and the identifier using the second secret key;
signing the second block that includes the string and the identifier using the second secret key;
signing a message using the second secret key to generate a signature, the message corresponding to a cross-blockchain transaction between the first blockchain and the second blockchain; and
providing the signature to a device, wherein the signature is verifiable by the device using the string and the identifier obtained by the device from one or more of the first block or the second block.