# US 2020/0401680 A1 · Method and apparatus for authenticating user > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0401680 A1 - Document ID: US20200401680A1 - Status: Published application - Kind: A1 - Application number: 16/907,483 - Filed: 2020-06-22 - Published: 2020-12-24 - Earliest claimed: 2019-06-24 - Assignees: Netmarble Corporation - Applicants: Netmarble Corporation - Inventors: Sun Keun SHIM; Jeong Pil CHEON; Gi Hun HAN - Web page: https://patentgrep.com/patent/US20200401680A1 ## CPC - G06F 21/32: using biometric data, e.g. fingerprints, iris scans or voiceprints - G06F 21/36: by graphic or iconic representation - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Disclosed is a user authentication method and apparatus. The user authentication method includes transmitting, to a user terminal, a visual authentication code that is recognized differently according to color vision deficiency, receiving, from the user terminal, a user input corresponding to the visual authentication code, and determining a user authentication result of a user based on a comparison result obtained by comparing the user input to a reference value determined based on pre-enrolled color vision information of the user. ## Claims ### Claim 1 A user authentication method based on color vision information, performed by a user authentication apparatus, the user authentication method comprising: transmitting, to a user terminal, a visual authentication code that is recognized differently according to color vision deficiency; receiving, from the user terminal, a user input corresponding to the visual authentication code; and determining a user authentication result of a user based on a comparison result obtained by comparing the user input to a reference value determined based on pre-enrolled color vision information of the user. ### Claim 2 (depends on 1) The user authentication method of claim 1, wherein the determining comprises determining that a user authentication of the user is successful, if an input value with respect to the visual authentication code included in the user input is the same as the reference value. ### Claim 3 (depends on 1) The user authentication method of claim 1, wherein the determining comprises determining that a user authentication of the user is failed, if an input value with respect to the visual authentication code included in the user input is different from the reference value. ### Claim 4 (depends on 1) The user authentication method of claim 1, wherein the pre-enrolled color vision information is determined in a user enrollment procedure based on a user input with respect to color vision information of the user, and includes information regarding whether the user has color vision deficiency. ### Claim 5 (depends on 4) The user authentication method of claim 4, wherein the pre-enrolled color vision information is enrolled information regarding whether the user has color vision deficiency, determined based on an input value with respect to a visual code that is read differently according to color vision deficiency input in the user enrollment procedure. ### Claim 6 (depends on 4) The user authentication method of claim 4, wherein the pre-enrolled color vision information is enrolled information regarding whether the user has color vision deficiency, determined based on a selected value with respect to color vision deficiency input in the user enrollment procedure. ### Claim 7 (depends on 1) The user authentication method of claim 1, wherein the visual authentication code is provided in the form of an image based on a color vision test, and is a number, a character, or a combination thereof that is read differently according to normal vision and color vision deficiency. ### Claim 8 (depends on 7) The user authentication method of claim 7, wherein the visual authentication code is a number, a character, or a combination thereof that is read differently according to at least one of protanomaly, deuteranomaly, tritanomaly, protanopia, deuteranopia, tritanopia, cone monochromatism, and rod monochromatism. ### Claim 9 (depends on 1) A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the user authentication method of claim 1. ### Claim 10 A user authentication apparatus for performing a user authentication method, the user authentication apparatus comprising: a memory and a processor, wherein the memory is configured to store instructions executable by the processor, and when the instructions are executed by the processor, the processor is configured to: transmit, to a user terminal, a visual authentication code that is recognized differently according to color vision deficiency, receive, from the user terminal, a user input corresponding to the visual authentication code, and determine a user authentication result of a user based on a comparison result obtained by comparing the user input to a reference value determined based on pre-enrolled color vision information of the user. ### Claim 11 (depends on 10) The user authentication apparatus of claim 10, wherein the processor is configured to determine that a user authentication of the user is successful, if an input value with respect to the visual authentication code included in the user input is the same as the reference value. ### Claim 12 (depends on 10) The user authentication apparatus of claim 10, wherein the processor is configured to determine that a user authentication of the user is failed, if an input value with respect to the visual authentication code included in the user input is different from the reference value. ### Claim 13 (depends on 10) The user authentication apparatus of claim 10, wherein the pre-enrolled color vision information is determined in a user enrollment procedure based on a user input with respect to color vision information of the user, and includes information regarding whether the user has color vision deficiency. ### Claim 14 (depends on 13) The user authentication apparatus of claim 13, wherein the pre-enrolled color vision information is enrolled information regarding whether the user has color vision deficiency, determined based on an input value with respect to a visual code that is read differently according to color vision deficiency input in the user enrollment procedure. ### Claim 15 (depends on 13) The user authentication apparatus of claim 13, wherein the pre-enrolled color vision information is enrolled information regarding whether the user has color vision deficiency, determined based on a selected value with respect to color vision deficiency input in the user enrollment procedure. ### Claim 16 (depends on 10) The user authentication apparatus of claim 10, wherein the visual authentication code is provided in the form of an image based on a color vision test, and is a number, a character, or a combination thereof that is read differently according to normal vision and color vision deficiency. ### Claim 17 (depends on 16) The user authentication apparatus of claim 16, wherein the visual authentication code is a number, a character, or a combination thereof that is read differently according to at least one of protanomaly, deuteranomaly, tritanomaly, protanopia, deuteranopia, tritanopia, cone monochromatism, and rod monochromatism. ### Claim 18 A user authentication method performed by a user terminal, the user authentication method comprising: receiving, from a user authentication apparatus, a visual authentication code that is recognized differently according to color vision deficiency; receiving a user input corresponding to the visual authentication code; and transmitting the received user input to the user authentication apparatus, wherein the user authentication apparatus is configured to determine a user authentication result of a user based on a comparison result obtained by comparing the user input to a reference value determined based on pre-enrolled color vision information of the user. ### Claim 19 (depends on 18) The user authentication method of claim 18, wherein the user authentication apparatus is configured to: determine that a user authentication of the user is successful, if an input value with respect to the visual authentication code included in the user input is the same as the reference value, and determine that a user authentication of the user is failed, if the input value with respect to the visual authentication code included in the user input is different from the reference value. ### Claim 20 (depends on 18) The user authentication method of claim 18, wherein the pre-enrolled color vision information is determined in a user enrollment procedure based on a user input with respect to color vision information of the user, and includes information regarding whether the user has color vision deficiency, and the visual authentication code is provided in the form of an image based on a color vision test, and is a number, a character, or a combination thereof that is read differently according to normal vision and color vision deficiency.