SECRET CALCULATION DEVICE, SECRET CALCULATION AUTHENTICATION SYSTEM, SECRET CALCULATION METHOD, AND PROGRAM

A secure computation device obtains a first concealed verification value [z]i = [w-ω]i with secure computation by using concealed authentication information [w]i which is preliminarily stored and concealed authentication information [ω]i which is inputted, obtains a concealed extension field random...

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Bibliographic Details
Main Authors CHIDA, Koji, MOROHASHI, Gembu, IKARASHI, Dai
Format Patent
LanguageEnglish
French
German
Published 30.12.2020
Subjects
ADVERTISING
CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PHYSICS
SEALS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A secure computation device obtains a first concealed verification value [z]i = [w-ω]i with secure computation by using concealed authentication information [w]i which is preliminarily stored and concealed authentication information [ω]i which is inputted, obtains a concealed extension field random number [rm]i∈[Fε] which is a secret sharing value of an extension field random number rm, obtains a second concealed verification value [ym]i in which ym is concealed with secure computation by using the first concealed verification value [z]i, and obtains a third concealed verification value [rmym]i with secure computation by using the concealed extension field random number [rm]i and the second concealed verification value [ym]i and outputs the third concealed verification value [rmym]i.
Bibliography:Application Number: EP20190757721