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SECRET COMPUTATION SYSTEM, ARITHMETIC UNIT, SECRET COMPUTATION METHOD AND PROGRAM
SECRET COMPUTATION SYSTEM, ARITHMETIC UNIT, SECRET COMPUTATION METHOD AND PROGRAM
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机译:秘密计算系统,算术单元,秘密计算方法和程序
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摘要
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 a0, . . . , aM−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 f1 of an operation target and an operation result depending on contents of secret operation into checksum C:=f0, . . . , fμ−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 [f1] 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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