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Vector concealment type inner product computation system, vector concealment type inner product calculation method and encryption key sharing system
Vector concealment type inner product computation system, vector concealment type inner product calculation method and encryption key sharing system
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机译:向量隐藏式内积计算系统,向量隐藏式内积计算方法和加密密钥共享系统
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摘要
A privacy-preserving scalar product calculation system is provided. A first unit linearly transforms an n-dimensional vector Va into an n-dimensional vector based on a scalar value based on a random number Wi and a random number Rj to calculate a remainder by dividing each element of the linearly transformed n-dimensional vector by a random number Mi, and transmits an n-dimensional converted vector X including each of the remainders as its element to the second unit, the second unit calculates an inner product value Z based on the received n-dimensional converted vector X and an n-dimensional vector Vb, and transmits the inner product value Z to the first unit, and the first unit further calculates, based on a reciprocal of the scalar value and the receive inner product value, a scalar value and which calculates a remainder by dividing the scalar value by the random number Mi.
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