# US 12,192,193 B2 · Li-Fi-based location authentication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,193 B2 - Document ID: US12192193B2 - Status: Granted - Kind: B2 - Application number: 17/980,885 - Filed: 2022-11-04 - Published: 2024-05-09 - Granted: 2025-01-07 - Earliest claimed: 2022-11-04 - Assignees: Capital One Services, LLC - Applicants: Capital One Services, LLC - Inventors: Joshua Kuehn; Dean Foster; Nicholas Capurso - Web page: https://patentgrep.com/patent/US12192193B2 ## CPC - H04L 63/083: {using passwords (cryptographic mechanisms or cryptographic arrangements for entity authentication using a predetermined code H04L9/3226)} - H04B 10/116: Visible light communication - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION ## Abstract Methods, systems, and apparatuses are described herein for improving the security of computer authentication using light communications data provided by, e.g., environmental Li-Fi light sources. A mobile device may receive light communications data from a light source, such as a Li-Fi-enabled light bulb in a physical environment of the mobile device. That light communications data may indicate a variation in a modulation of light intensity of the light source over a time period. That variation might be used to provide a time- and/or location-specific key. The mobile device may determine the key by processing the light communications data and transmit a request for content that comprises the key. Access to content may be provided to the mobile device based on the key. ## Claims ### Claim 1 A mobile device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the mobile device to: receive, via a light-sensitive device and from a light source in a physical environment of the mobile device, light communications data that indicates a variation in a modulation of light intensity of the light source over a time period by: determining, using a Global Positioning System (GPS) module of the mobile device, GPS coordinates corresponding to the mobile device; determining, based on the GPS coordinates, a predetermined framerate; causing one or more cameras to record video at the predetermined framerate; and determining the light communications data by processing the video, wherein the light source is configured to transmit different keys on a periodic basis; determine a key corresponding to the light source and the time period by processing the light communications data; transmit, to a remote server, a request for content, wherein the request for content comprises the key; and receive, from the remote server and based a determination that the key is associated with the physical environment, access to the content. ### Claim 2 (depends on 1) The mobile device of claim 1, wherein the light-sensitive device comprises a Li-Fi receiver communicatively coupled to the mobile device, and wherein the light source comprises a Li-Fi transmitter. ### Claim 3 (depends on 1) The mobile device of claim 1, wherein the variation in the modulation of the light intensity of the light source over the time period comprises a modulation of ultraviolet light emitted by the light source over the time period. ### Claim 4 (depends on 1) The mobile device of claim 1, wherein the instructions, when executed by the one or more processors, cause the mobile device to process the light communications data by causing the mobile device to: process the modulation of the light intensity of the light source over the time period to determine the key. ### Claim 5 (depends on 1) The mobile device of claim 1, wherein the light source is configured to transmit data via light in accordance with a wireless transmission protocol. ### Claim 6 (depends on 1) The mobile device of claim 1, wherein the instructions, when executed by the one or more processors, cause the mobile device to: receive, via a user interface, user authentication credentials, wherein the request for the content comprises the user authentication credentials. ### Claim 7 (depends on 1) The mobile device of claim 1, wherein the light source comprises a light bulb. ### Claim 8 (depends on 1) The mobile device of claim 1, wherein the instructions, when executed by the one or more processors, cause the mobile device to transmit the request for the content by causing the mobile device to: transmit, via a wireless network protocol different from Li-Fi, the request for the content. ### Claim 9 (depends on 1) The mobile device of claim 1, wherein the light communications data further indicates a variation in color of the light source over the time period. ### Claim 10 A method comprising: receiving, by a mobile device, via a light-sensitive device, and from a light source in a physical environment of the mobile device, light communications data that indicates a variation in color of the light source over a time period by: determining, using a Global Positioning System (GPS) module of the mobile device, GPS coordinates corresponding to the mobile device; determining, based on the GPS coordinates, a predetermined framerate; causing one or more cameras to record video at the predetermined framerate; and determining the light communications data by processing the video, wherein the light source is configured to transmit different keys on a periodic basis; determining a key corresponding to the light source and the time period by processing the light communications data; transmitting, to a remote server, a request for content, wherein the request for content comprises the key; and receiving, from the remote server and based a determination that the key is associated with the physical environment, access to the content. ### Claim 11 (depends on 10) The method of claim 10, wherein the light-sensitive device comprises a Li-Fi receiver communicatively coupled to the mobile device, and wherein the light source comprises a Li-Fi transmitter. ### Claim 12 (depends on 10) The method of claim 10, wherein the variation in the color of the light source over the time period comprises switching between two colors over the time period, wherein each of the two colors represents a binary value. ### Claim 13 (depends on 10) The method of claim 10, wherein processing the light communications data comprises: processing the variation in color of the light source over the time period to determine the key. ### Claim 14 (depends on 10) The method of claim 10, wherein the light source is configured to transmit data via light in accordance with a wireless transmission protocol. ### Claim 15 One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors of a mobile device, cause the mobile device to: receive, via a Li-Fi receiver and from a Li-Fi transmitter in a physical environment of the mobile device, light communications data that indicates a variation in a modulation of light intensity of the Li-Fi transmitter over a time period by: determining, using a Global Positioning System (GPS) module of the mobile device, GPS coordinates corresponding to the mobile device; determining, based on the GPS coordinates, a predetermined framerate; causing one or more cameras to record video at the predetermined framerate; and determining the light communications data by processing the video, wherein the Li-Fi transmitter is configured to transmit different keys on a periodic basis; determine a key corresponding to the Li-Fi transmitter and the time period by processing the light communications data; transmit, to a remote server, a request for content, wherein the request for content comprises the key; and receive, from the remote server and based a determination that the key is associated with the physical environment, access to the content. ### Claim 16 (depends on 15) The one or more non-transitory computer-readable media of claim 15, wherein the light communications data further indicates a variation in color of the Li-Fi transmitter over the time period. ### Claim 17 (depends on 15) The one or more non-transitory computer-readable media of claim 15, wherein the variation in the modulation of the light intensity of the Li-Fi transmitter over the time period comprises a modulation of ultraviolet light emitted by the Li-Fi transmitter over the time period. ### Claim 18 (depends on 15) The one or more non-transitory computer-readable media of claim 15, wherein the instructions, when executed by the one or more processors, cause the mobile device to process the light communications data by causing the mobile device to: process the modulation of the light intensity of the Li-Fi transmitter over the time period to determine the key.