Encryption processing method and encryption processing device

An encryption processing device comprising:

• a logical circuit capable of programmably setting to a plurality of logics for executing cipher processing;
• a memory that stores a plurality of logical configurations each corresponding to a respective plurality of logics, the logical configurations each corresponding to identical cipher processing;
• and
• a CPU that manages a selective setting of the logical circuit to one plurality of logics for performance of the identical cipher processing based on the logical configuration of the plurality of logical configurations in the memory that corresponds to the one plurality of logics, and
• wherein the plurality of logical configurations include a plurality of mask parameters that are used during execution of the identical cipher processing, and
• wherein the CPU performs arithmetic processing to create configuration information for setting of the logical circuit from the logical configuration that corresponds to the one plurality of logics with fixed values for the plurality of mask parameters.