ST X-CUBE-SBSFU, User Manual, Page: 72 / 94

Cryptographic schemes handling UM2262
72/94 UM2262 Rev 6
D.2 Asymmetric verification and symmetric encryption schemes
These schemes (SECBOOT_ECCDSA_WITH_AES128_CBC_SHA256,
SECBOOT_ECCDSA_WITH_AES128_CTR_SHA256,
SECBOOT_ECCDSA_WITHOUT_ENCRYPT_SHA256) are implemented for firmware
decryption and verification as illustrated in
Figure 39 .
Figure 39. Asymmetric verification and symmetric encryption