# US 2023/0412362 A1 · Information concealing control apparatus, information concealing apparatus, information reconfiguration control apparatus, information reconfiguring apparatus, information concealing system, information concealing control method, information reconfiguration control method, information concealing control program, and information reconfiguration control program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0412362 A1 - Document ID: US20230412362A1 - Status: Published application - Kind: A1 - Application number: 18/034,849 - Filed: 2020-11-17 - Published: 2023-12-21 - Earliest claimed: 2020-11-17 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Hiroto TAMIYA; Toshiyuki Isshiki - Web page: https://patentgrep.com/patent/US20230412362A1 ## CPC - H04L 9/0656: {Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher} - H04L 9/0825: {using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates} - H04L 9/0866: {involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics} - H04L 9/0869: {involving random numbers or seeds} - 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 2209/34: Encoding or coding, e.g. Huffman coding or error correction - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An information concealing system includes: an information concealing apparatus configured to generate a pseudo-random number, convert first information into first conversion information by using the pseudo-random number, and cause a concealment information generating unit to generate first concealment information capable to reconfigure the first information, based on the first conversion information; and an information reconfiguring apparatus configured to extract information related to a seed from the first concealment information, generate a reconfiguration-side pseudo-random number, based on the information related to the seed, convert input second information into second conversion information by using the reconfiguration-side pseudo-random number, and reconfigure the first information concealed as the first concealment information, based on the second conversion information and the first concealment information. ## Claims ### Claim 1 An information concealing control apparatus comprising: a memory storing instructions; and one or more processors configured to execute the instructions to: generate a pseudo-random number from a seed; perform converting processing of converting first information being input into first conversion information by using the pseudo-random number; and cause a concealment information generating unit generating concealment information based on input information to generate first concealment information capable to reconfigure the first information, based on the first conversion information. ### Claim 2 (depends on 1) The information concealing control apparatus according to claim 1, wherein the one or more processors are configured to execute the instructions to cause the concealment information generating unit to generate the concealment information when a Hamming weight of the first conversion information is equal to or greater than a first value. ### Claim 3 (depends on 2) The information concealing control apparatus according to claim 2, wherein the first value is error correction capability of a private key embedded in the first conversion information by the concealment information generating unit. ### Claim 4 (depends on 1) The information concealing control apparatus according to claim 1, wherein the first information is biometric information. ### Claim 5 (depends on 4) The information concealing control apparatus according to claim 4, wherein the seed includes identification information managed by a user who has input the biometric information. ### Claim 6 (depends on 1) The information concealing control apparatus according to claim 1, wherein the seed includes a disposable temporary value. ### Claim 7 (depends on 1) The information concealing control apparatus according to claim 1, wherein the converting processing includes reversible computing of the first information and the pseudo-random number. ### Claim 8 (canceled) ### Claim 9 An information reconfiguration control apparatus comprising: a memory storing instructions; and one or more processors configured to execute the instructions to: extract information related to a seed from first concealment information generated by a concealment information generating unit generating concealment information based on input information, the first concealment information being capable to reconfigure first information; generate a reconfiguration-side pseudo-random number, based on the information related to the seed being extracted; convert input second information into second conversion information by using the reconfiguration-side pseudo-random number; and cause a reconfiguring unit configured to reconfigure information concealed as the concealment information to reconfigure the first information concealed as the first concealment information, based on the second conversion information and the first concealment information. ### Claim 10 (depends on 9) The information reconfiguration control apparatus according to claim 9, wherein the one or more processors are configured to execute the instructions to cause the reconfiguring unit to reconfigure the first information concealed as the concealment information when a Hamming distance between the first information and the second information is equal to or less than a predetermined value. ### Claim 11 (depends on 9) The information reconfiguration control apparatus according to claim 9, wherein the first information and the second information are biometric information. ### Claim 12 (depends on 11) The information reconfiguration control apparatus according to claim 11, wherein the one or more processors are configured to execute the instructions to generate the reconfiguration-side pseudo-random number by using identification information managed by a user who has input the biometric information and the information related to the seed. ### Claim 13 (depends on 9) The information reconfiguration control apparatus according to claim 9, wherein the information related to the seed includes a disposable temporary value. ### Claim 14 (canceled) ### Claim 15 (canceled) ### Claim 16 An information concealing control method comprising: generating a pseudo-random number from a seed; performing converting processing of converting first information being input into first conversion information by using the pseudo-random number; and causing a concealment information generating unit generating concealment information based on input information to generate first concealment information capable to reconfigure the first information, based on the first conversion information. ### Claim 17 An information reconfiguration control method comprising: extracting information related to a seed from first concealment information generated by a concealment information generating unit generating concealment information based on input information, the first concealment information being capable to reconfigure first information; generating a reconfiguration-side pseudo-random number by using the seed being extracted; converting input second information into second conversion information by using the reconfiguration-side pseudo-random number; and causing a reconfiguring unit configured to reconfigure information concealed as the concealment information to reconfigure the first information concealed as the first concealment information, based on the second conversion information and the first concealment information. ### Claim 18 (canceled) ### Claim 19 (canceled)