DEVICE AND METHOD FOR RECIPROCAL OPERATION ON FINITE FIELD GF

摘要

PURPOSE: A device and a method for a reciprocal operation on the finite field GF are provided to facilitate the realization/expansion of a reciprocal operation device and realize a fast process of an elliptical curve encryption device by performing the reciprocal operation as calculating a reciprocal number of a modular for two elements of the GF(2¬m). CONSTITUTION: The storages(400-700) store an initial input value and a halfway operation result of the reciprocal operation. Input processors(100,200) perform/select the operation for the input value stored in the storages. A degree searcher(800) searches a degree of an operation result value. A degree comparison generator(900) compares the searched degrees and generates a new degree. A controller(300) controls respective tools for the reciprocal operation.