Title:
SECRET CALCULATION INFORMATION EXCHANGE SYSTEM, DATA PROCESSING DEVICE, SECRET CALCULATION INFORMATION EXCHANGE METHOD, SECRET CALCULATION INFORMATION EXCHANGE PROGRAM, AND RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP2016109891
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To secretly calculate a result of application of an arithmetic operation, which is performed using as an input secret data preserved by plural organizations, without transmitting or receiving a ciphertext and causing unrelated information to be learned by others.SOLUTION: Two or more data processing devices 100 are included. One of the data processing devices 100 includes a memory unit 130 that stores secret data and a fixed ciphertext string, a transmission parameter string calculation unit 111 that calculates a transmission parameter string and first result using the secret data and fixed ciphertext string, and a final result calculation unit 112 that acquires a second result produced by any other data processing device, and calculates a final result on the basis of the first result and second result. The other data processing devices 100 include a fixed ciphertext decoder 113 that uses a decoding key to decode part of the fixed ciphertext string and calculates a fixed ciphertext decoding result, and a partial result calculation unit 114 that acquires the transmission parameter string produced by any other data processing device, and produces the second result by applying an arithmetic operation together with the fixed ciphertext decoding result.SELECTED DRAWING: Figure 6
Inventors:
JODOI YOKO
WAKABAYASHI SHINICHI
WAKABAYASHI SHINICHI
Application Number:
JP2014247667A
Publication Date:
June 20, 2016
Filing Date:
December 08, 2014
Export Citation:
Assignee:
UNIV HIROSHIMA CITY
International Classes:
G09C1/00; G06F21/71
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