Design Principles for Public Key Cryptography System Protected with Power Analysis

Side channel information could be used to analysis the key information according to leakage information depending on the operation of cryptography algorithm and its hardware. And power analysis is the chief method. In this paper, an improved architecture for RSA system against power analysis was proposed based on its basic theory. A DPA attack for RSA specially, is discussed in details, and the shadow technology was proposed based on it. In order to maximize the capability/cost. Shadow technique and removing intermediate value technique are introduced into RSA system, which only cost more than 30% timing to realizing secure RSA algorithm. Contemporary the effectiveness of advanced RSA cryptography system was illuminate briefly.