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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Bibliographische Detailangaben
Hauptverfasser:	CHIDA, Koji, MOROHASHI, Gembu, IKARASHI, Dai
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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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Beschreibung
Zusammenfassung:	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.