| 摘要 |
A device for converting a term comprising a product of a first operand and a second operand into a representation having an integer quotient regarding a modulus and a remainder, the integer quotient being defined by T/N, T being the term and N being the modulus, and the remainder being defined by T mod N, N being the modulus, includes means for modularly reducing the term using the modulus on the one hand and for modularly reducing the term using an auxiliary modulus, which is greater than the modulus, on the other hand to obtain the remainder on the one hand and the auxiliary remainder on the other hand. Both the remainder and the auxiliary remainder are fed into means for combining to obtain the integer quotient. The inventive device makes it possible to calculate even the integer quotient, that is the result of the DIV operation, by performing a command for a modular multiplication existing on conventional cryptoprocessors two times.
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