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公开(公告)号：US20210105255A1
公开(公告)日：2021-04-08
申请号：US16955739
申请日：2018-12-11
Applicant: Tokyo University of Science Foundation
Inventor： Satoshi Iriyama , Maki Kihara
Abstract: An encrypted data processing system is provided including an encryption device and a server. The encryption device includes an encrypting section that encrypts first information based on a first encryption key and transmits the encrypted information for registration to the server, and encrypts second information based on a second encryption key and transmits the encrypted information to be compared to the server. The server includes a comparison section that employs a cipher comparison function for comparing encrypted information to compare the encrypted information for registration against the encrypted information to be compared, and transmits a comparison result to the encryption device. The encryption device further includes a comparison result decrypting section that employs a decryption function for decrypting the comparison result with the first encryption key and the second encryption key to find a degree of matching between the first information and the second information.
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公开(公告)号：US11431686B2
公开(公告)日：2022-08-30
申请号：US16955739
申请日：2018-12-11
Applicant: Tokyo University of Science Foundation
Inventor： Satoshi Iriyama , Maki Kihara
Abstract: An encrypted data processing system is provided including an encryption device and a server. The encryption device includes an encrypting section that encrypts first information based on a first encryption key and transmits the encrypted information for registration to the server, and encrypts second information based on a second encryption key and transmits the encrypted information to be compared to the server. The server includes a comparison section that employs a cipher comparison function for comparing encrypted information to compare the encrypted information for registration against the encrypted information to be compared, and transmits a comparison result to the encryption device. The encryption device further includes a comparison result decrypting section that employs a decryption function for decrypting the comparison result with the first encryption key and the second encryption key to find a degree of matching between the first information and the second information.
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公开(公告)号：US20230070704A1
公开(公告)日：2023-03-09
申请号：US17799750
申请日：2021-02-15
Applicant: TOKYO UNIVERSITY OF SCIENCE FOUNDATION
Inventor： Satoshi Iriyama , Maki Kihara
Abstract: In an encryption authentication system, a service server transmits the third encryption information to a user terminal, in a case where the service server receives a request from the user terminal. The user terminal calculates fourth encryption information and transmits the fourth encryption information to an encryption server. The encryption server and the calculation server cooperate with each other to calculate encryption information as a collation target and transmit the encryption information to the service server. The service server obtains a coincidence degree between the first plaintext information included in the encryption information as the collation target and the second plaintext information, by a collation function using a third encryption key and a second encryption key used to calculate registration encryption information, and transmits an authentication result corresponding to the coincidence degree to the user terminal.
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