Title:
CONFIDENTIAL INFORMATION PROCESSING SYSTEM, CONFIDENTIAL INFORMATION PROCESSING METHOD, AND CONFIDENTIAL INFORMATION PROCESSING PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/242955
Kind Code:
A1
Abstract:
Provided is a confidential information processing system supporting quantum homomorphic cryptography satisfying strong circuit confidentiality, the system comprising an encryption device (400). The encryption device (400) comprises an encryption unit (404) that generates a first ciphertext by encrypting a first plaintext using a first public parameter and a first encryption key and generates a second ciphertext by encrypting a second plaintext using a second public parameter and a second encryption key. Each of the first parameter and the second public parameter is generated by using a security parameter. The first encryption key is generated by using the first public parameter and a first decryption key generated by using the security parameter. The second encryption key is generated by using the second public parameter and a second decryption key generated by using the security parameter.
Inventors:
HIROMASA RYO (JP)
Application Number:
PCT/JP2022/023823
Publication Date:
December 21, 2023
Filing Date:
June 14, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H04L9/14; G09C1/00; H04L9/08
Domestic Patent References:
| WO2021245931A1 | 2021-12-09 |
Foreign References:
| CN108847934A | 2018-11-20 |
Other References:
HIROMASA, RYO: "(Quantum) Fully homomorphic encryption and circuit secrecy", WORKSHOP ON KYOTO QUANTUM CRYPTOGRAPHY. KYOTO UNIVERSITY INTERNATIONAL RESEARCH UNIT OF QUANTUM INFORMATION [ONLINE], 16 March 2021 (2021-03-16), pages 15 - 18, Retrieved from the Internet
Attorney, Agent or Firm:
CROSS-BORDER PATENT FIRM (JP)
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