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

Claim 8:
9. A blockchain node, comprising:
one or more processors; and
one or more memories storing executable-instructions that, when executed by the one or more processors, cause the blockchain node to:
receive a first public key from a first server computer, the first public key being associated with a communication device of a user;
generate a second public key and a second private key associated with the user of the communication device;
sign the first public key with the second private key to generate a digital signature for the user;
record the digital signature on a blockchain stored on one or more blockchain nodes comprising the blockchain node;
transmit the digital signature to the first server computer;
receive, from a second server computer, a request comprising the digital signature;
verify the digital signature received in the request against the digital signature recorded on the blockchain; and
transmit, to the second server computer, an indication that the digital signature has been verified, wherein the second server computer thereafter processes a transaction corresponding to the request.