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

摘要

CRYPTOGRAPHY CIRCUIT PARTICULARLY PROTECTED AGAINST INFORMATION-LEAK OBSERVATION ATTACKS BY THE CIPHERING THEREOFThe present invention relates to a cryptography circuit, protected notably against information-leak observation attacks.The cryptography circuit (21) comprises'a functional key k for executing a cryptography algorithm. It comprises a second key k unique and specific to the circuit making it possible to protect by masking the functional and confidential key k or a confidential implementation of the algorithm.Figure 4