CRYPTOGRAPHY CIRCUIT PARTICULARLY PROTECTED AGAINST INFORMATION-LEAK OBSERVATION ATTACKS BY THE CIPHERING THEREOF

摘要

CRYPTOGRAPHY CIRCUIT PARTICULARLY PROTECTED AGAINSTINFORMATION-LEAK OBSERVATION ATTACKS BY THE CIPHERINGTHEREOFThe present invention relates to a cryptography circuit, protected notablyagainst information-leak observation attacks.The cryptography circuit (21) comprises· a functional keykcfor executing acryptography algorithm. It comprises a second keyk;unique and specific tothe circuit making it possible to protect by masking the functional andconfidential keykcor a confidential implementation of the algorithm.Figure 41111111111111111111111111111111111111111/"'162162/"'......~..........._lUll/Ill1111/~U~~U~. -·---/"1'r()0002•----------