| 摘要 |
<p>A safe cryptographic calculation method of a cryptographic system according to an embodiment of the present invention comprises the steps of performing cryptographic calculation in a first base encryption function; performing a first side channel preventing external calculation by using the value calculated in the first base encryption function and first additional information; performing second side channel preventing calculation by using the value calculated from the first side channel preventing external calculation process and second additional information; and performing encryption calculation in the base encryption function by using the value calculated for the second side channel prevention in a second encryption function. According to the present invention, the costs of a side channel corresponding method for safe cryptographic communications can be significantly reduced.</p> |
