Patent ID: 11876905
Assignee: VISA INTERNATIONAL SERVICE ASSOCIATION
Field: IT methods for management (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 18:
19. The blockchain node of claim 9, wherein the communication device is a first communication device, and the digital signature is a first digital signature, and wherein executing the executable-instructions further causes the blockchain node to:
receive a third public key with the first public key, the third public key being associated with a second communication device of the user;
sign the third public key with the second private key generated by the blockchain node to generate a second digital signature for the user;
record the second digital signature with the first digital signature on the blockchain; and
transmit the second digital signature with the first digital signature to the first server computer causing the first server computer to generate a first trust token for the first communication device and a second trust token for the second communication device for one or more subsequent transactions.