US 12,113,901 B2
Authentication device, system and method
Simon Blythe, Ely (GB)
Assigned to MASTERCARD INTERNATIONAL INCORPORATED, Purchase, NY (US)
Filed by MASTERCARD INTERNATIONAL INCORPORATED, Purchase, NY (US)
Filed on Sep. 24, 2020, as Appl. No. 17/030,997.
Claims priority of application No. 19206665 (EP), filed on Oct. 31, 2019.
Prior Publication US 2021/0184851 A1, Jun. 17, 2021
Int. Cl. H04L 9/32 (2006.01); H04L 9/08 (2006.01); H04L 9/40 (2022.01)
CPC H04L 9/321 (2013.01) [H04L 9/0827 (2013.01); H04L 9/0866 (2013.01); H04L 63/0428 (2013.01); H04L 63/0861 (2013.01)] 9 Claims
OG exemplary drawing
 
3. An authentication device comprising:
a light sensor; and
a transmitter;
wherein the authentication device is configured to:
receive a unique identifier from a user device by sensing, with the light sensor, a visual element encoding the unique identifier that is displayed on a display of the user device;
transmit, to a server, the unique identifier;
receive, from the server, a cryptographic key corresponding to the unique identifier;
transmit, with the transmitter to the user device, the cryptographic key for decryption of an electronic message corresponding to the unique identifier;
receive a sender's identification by scanning a second visual element encoding the sender's identification that is displayed on the display of the user device; and
transmit, to the server, the sender's identification.