BUILT-IN DEVICE WITH FAULT ATTACK COUNTERMEASURE FUNCTION

摘要

An encryption processing device comprises a memory means, an initial setting means for setting a value to be stored in the memory means, a Montgomery multiplication remainder operation means for performing a plurality of Montgomery multiplication remainder operations on the value set by the initial setting means, and a fault attack detection means for judging, for every at least a part of the Montgomery multiplication remainder operations, whether a fault attack has occurred.