SYSTÈME DE TRANSMISSION CRYPTOGRAPHIQUE UTILISANT UNE CLE DE CHIFFREMENT DE CLE

摘要

A microcontroller includes on-chip key storage slots stored in a non-volatile memory, wherein selecting which key is to be used is restricted to software, wherein a predetermined key storage slot stores a Key Encrypt Key (KEK), and a register flag is provided for determining whether the predetermined key storage slot stores a key for encrypting/decrypting data or the KEK for encrypting/decrypting a key.