BASIC OPERATION UNIT AND METHOD WITH SAFETY FOR ELECTRIC POWER ANALYSIS ATTACK

摘要

PPROBLEM TO BE SOLVED: To provide a basic operation unit and a method which are safe for electric power analysis attack. PSOLUTION: The basic operation unit is basically configured with a random mask apparatus, a random data generator and a logical operation unit. In the course of logical operation, logical operation is executed by a method wherein only random data or random mask data or data of random mask format are used as variable in order to prevent exposure of input data. As a result, result of basic operation to the above input data is outputted by random mask format. By the basic operation unit, safety is obtained to electric power analysis attack since exhausted electric power is changed even if the same data is inputted. PCOPYRIGHT: (C)2005,JPO&NCIPI