METHOD FOR REALIZING NON-TIME DETERMINED ENCRYPTION ALGORITHM

摘要

A method for realizing a non-time determined encryption algorithm is provided to effectively defend against temporal attacks by arranging a finish time of a round function in a non-time determined manner. A round function is used for an encryption algorithm, which uses an input message and an encryption key value. Random time delay functions having different finish times are added to respective round functions. The added random time delay functions are executed simultaneously with the round function. The finish times of the random time delay functions are arranged to be different for respective execution routines. The random time delay function has a routine, which is independent from I/O operations for corresponding round functions.