Lock the OTP value of key's hash after the command $> stm32key fuse <address> This operation forbids a second update of these OTP as they are ECC protected in BSEC: any update of these OTP with a different value causes a BSEC disturb error and the closed chip will be bricked. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>