Secret computation system, arithmetic unit, secret computation method and program

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United States of America Patent

PATENT NO 9860058
SERIAL NO

14758373

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Each of at least three arithmetic units includes: a random number generator determining shared value [r] obtained by performing secret sharing of random number r; a randomizator using shared value [a0], . . . , [aM−1] obtained by performing secret sharing of value a0, . . . , aM−1 and shared value [r] to generate randomized shared value 0>, . . . , M−1> with shared values [a0], . . . , [aM−1] and [a0r], . . . , [aM−1r] as a pair; a secret computator determining concealed function value [F([a0], . . . , [aM−1])] by executing function F including at least one secret operation while including randomized shared value i> of an operation target and an operation result depending on contents of secret operation into checksum C:=0>, . . . , μ−1>; and a correctness prover verifying correctness of function value [F([a0], . . . , [aM−1])] based on shared value [Ø] obtained by multiplying a sum total of shared values [fi] included in checksum C by shared value [r] and shared value [ψ] of a sum total of shared values [fir] included in checksum C.

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Patent Owner(s)

  • NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chida, Koji Tokyo, JP 38 204
Hamada, Koki Tokyo, JP 80 270
Ikarashi, Dai Tokyo, JP 82 235
Kikuchi, Ryo Tokyo, JP 62 412

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