The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 2026
Filed:
Nov. 09, 2021
Visa International Service Association, San Francisco, CA (US);
Gaven Watson, Palo Alto, CA (US);
Kim Wagner, Sunnyvale, CA (US);
Maliheh Shirvanian, Cupertino, CA (US);
Saikrishna Badrinarayanan, Fremont, CA (US);
Srinivasan Raghuraman, Cambridge, MA (US);
Sunpreet Arora, Union City, CA (US);
Visa International Service Association, San Francisco, CA (US);
Abstract
A method is disclosed. The method includes generating, by a first user device in association with a second user device, a second secret key on the second user device. The second secret key is derived from a first secret held by the first user device. The method includes generating a first commitment, transmitting, to the second user device, the first commitment, receiving, from the second user device, a second commitment, receiving, from the second user device, a random value and a ciphertext. The ciphertext is generated using the first commitment, the second commitment, and the random value. The method also includes verifying the ciphertext, and in response to verifying the ciphertext, modifying a group to include the second user device.