| 摘要 |
A method of obfuscating an exponent is provided. The method comprises identifying a value lambda for which it holds that lambda>0 and xlambda=1 for a plurality of elements x which are to be used in a cryptographic process. The method further comprises identifying an obfuscated exponent y which is greater than lambda and providing information indicative of the obfuscated exponent y. The method comprises establishing a key value a, wherein a<lambda, selecting a positive integer b, and computing y=a+blambda. |
