| 摘要 |
The invention relates to a method for countermeasuring in an electronic component while using a public key cryptographic algorithm. The invention is characterized in that the method comprises an exponentiation calculation with a left-to-right exponentiation algorithm y=g &cir& d, in which g and y are elements of the specified group G noted in a multiplicative manner and d is a predetermined number. The inventive method is also characterized by comprising a random selection step at the beginning of or during the execution of said exponentiation algorithm in a deterministic or probabilistic manner for masking the accumulator A. |
