| 摘要 |
The invention relates to a cryptographic method secured against a covert channel attack. According to the invention, in order to carry out a selected block of instructions (<j) as a function of an input variable (D1) amongst N predefined instruction blocks (?1,, ?N), a common block ( GAMMA (k,s)) is carried out on the predefined N instruction blocks (?1,, ?N), a predefined number (Lj) of times, the predefined number (Lj) being associated with the selected instruction block (?j). |
