Secret computation system, arithmetic unit, secret computation method and program
US9860058B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2014 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Jun 12, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/46
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
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 <fi> 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 [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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.