US 12,443,946 B2
Method and system for enabling traceable privacy-maintaining multi-hop offline transactions in digital currencies
Stephen Higgins, Dublin (IE)
Assigned to MASTERCARD INTERATIONAL INCORPORATED, Purchase, NY (US)
Filed by Mastercard International Incorporated, Purchase, NY (US)
Filed on Jan. 2, 2024, as Appl. No. 18/402,114.
Application 18/402,114 is a continuation of application No. 17/550,596, filed on Dec. 14, 2021, granted, now 11,900,367.
Prior Publication US 2024/0135368 A1, Apr. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06Q 20/00 (2012.01); G06Q 20/38 (2012.01); G06Q 20/40 (2012.01)
CPC G06Q 20/3825 (2013.01) [G06Q 20/38215 (2013.01); G06Q 20/3829 (2013.01); G06Q 20/4014 (2013.01); G06Q 20/409 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for processing offline cryptocurrency transfers, comprising:
storing, in a secure element of a computing device, a first public key of a first key pair;
communicating, by the computing device, with a blockchain node in a blockchain network, to request a cryptographically signed transfer message;
receiving, by the computing device, a first transfer message that is cryptographically signed by the blockchain node using a first private key of the first key pair and is associated with a transfer of cryptographic currency;
validating the cryptographic signature of the first transfer message using the first public key of the first key pair stored in the secure element of the computing device;
receiving, by the computing device, a transfer instruction, the transfer instruction including at least a communication address;
generating, by the computing device, a data container by wrapping the first validated first transfer message with a second transfer message; and
electronically transmitting, by the computing device, the data container to an external device based on at least the communication address.