# US 2022/0286451 A1 · Information processing system, information processing method, and program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0286451 A1 - Document ID: US20220286451A1 - Status: Published application - Kind: A1 - Application number: 17/605,970 - Filed: 2020-03-24 - Published: 2022-09-08 - Earliest claimed: 2019-04-24 - Inventors: Masaaki TOKUYAMA - Web page: https://patentgrep.com/patent/US20220286451A1 ## CPC - H04L 63/0861: {using biometrical features, e.g. fingerprint, retina-scan (cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data H04L9/3231)} - G06F 21/32: using biometric data, e.g. fingerprints, iris scans or voiceprints - G06F 21/602: {Providing cryptographic facilities or services} - G06F 21/6218: {to a system of files or objects, e.g. local or distributed file system or database} - G09C 1/00: Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system (cryptographic typewriters G09C3/00) - H04L 9/3231: {Biological data, e.g. fingerprint, voice or retina (network architectures or network communication protocols for supporting authentication of entities using biometrical features in a packet data network H04L63/0861)} - H04L 63/105: {Multiple levels of security} - G06F 2221/2117: User registration - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09C: CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY ## Abstract An information processing system (100) includes a first terminal (4A), an authentication server (1), and a second terminal (4B). The first terminal (4A) stores, into a plurality of clouds (3) in a distributed manner, a plurality of divided files generated by dividing a file including data of information generated by a first user into a plurality of files. The authentication server (1) authenticates a user to be the user himself or herself. The second terminal (4B) acquires a plurality of divided files distributed across a plurality of clouds (3) by the first terminal (4A) when a second user using the second terminal (4B) is authenticated to be the second user himself or herself by the authentication server (1). The second terminal (4B) acquires a file including data of information generated by the first user by restoring the acquired plurality of divided files. ## Claims ### Claim 1 An information processing system comprising: a first terminal storing, into a plurality of clouds in a distributed manner, a plurality of divided files generated by dividing a file including data of information generated by a first user into a plurality of files; an authentication server authenticating a user to be the user himself or herself; and a second terminal acquiring a plurality of divided files distributed across a plurality of clouds by the first terminal when a second user using the second terminal is authenticated to be the second user himself or herself by the authentication server and acquiring a file including data of information generated by the first user by restoring the acquired plurality of divided files. ### Claim 2 (depends on 1) The information processing system according to claim 1, wherein each of the first terminal and the second terminal includes a user authenticator authenticating the first user and the second user using the first terminal and the second terminal. ### Claim 3 (depends on 2) The information processing system according to claim 2, wherein, when a total value of a score value based on first authentication data acquired from the first user and the second user using the first terminal and the second terminal, and a score value based on second authentication data acquired from the first user and the second user using the first terminal and the second terminal is equal to or greater than a predetermined total value, the user authenticator authenticates the first user and the second user using the first terminal and the second terminal to be the first user and the second user themselves. ### Claim 4 (depends on 3) The information processing system according to claim 3, wherein the first authentication data are data based on biometric information of the first user and the second user using the first terminal and the second terminal, and the second authentication data are data based on a specific behavior of the first user and the second user when using the first terminal and the second terminal. ### Claim 5 (depends on 2) The information processing system according to claim 2, wherein the user authenticator includes an authentication information acquirer acquiring first authentication data and second authentication data from the first user and the second user, and an authentication determiner determining whether authentication is successful, based on either or both of first authentication data and second authentication data acquired by the authentication information acquirer, and the authentication determiner determines authentication to be successful when an authentication value based on first authentication data acquired by the authentication information acquirer in a background is less than a predetermined authentication threshold value and determines whether authentication is successful, based on second authentication data acquired by the authentication information acquirer, when an authentication value based on the first authentication data is equal to or greater than the authentication threshold value and equal to or less than a predetermined allowable authentication value. ### Claim 6 (depends on 5) The information processing system according to claim 5, wherein the authentication determiner further determines whether authentication is successful, based on third authentication data acquired by the authentication information acquirer when an authentication value based on the first authentication data exceeds the allowable authentication value or authentication based on the second authentication data is determined to be unsuccessful. ### Claim 7 An information processing method executed by an information processing system, the information processing method comprising: storing, in a distributed manner, a plurality of divided files generated by dividing a file including data of information generated by a first user into a plurality of files; and acquiring the plurality of divided files stored in a distributed manner when a second user is authenticated to be the second user himself or herself and acquiring a file including data of information generated by the first user by restoring the acquired plurality of divided files. ### Claim 8 A non-transitory computer-readable recording medium storing a program, the program causing a computer to execute: processing of storing, in a distributed manner, a plurality of divided files generated by dividing a file including data of information generated by a first user into a plurality of files; and processing of acquiring the plurality of divided files stored in a distributed manner when a second user is authenticated to be the second user himself or herself and acquiring a file including data of information generated by the first user by restoring the acquired plurality of divided files.