Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32h5/STM32H533/OTFDEC/OTFDEC_CR#0x0
ENC=B_0x0
OTFDEC control register
Encryption mode bit
0 (B_0x0): OTFDEC working in decryption mode
1 (B_0x1): OTFDEC working in encryption mode
https://github.com/modm-io/cmsis-svd-stm32