see: https://help.axis.com/en-us/axis-os-hardening-guide#trusted-public-key-infrastructure and: https://help.axis.com/en-us/axis-os-hardening-guide#signed-video
see: https://help.axis.com/en-us/axis-os-hardening-guide#trusted-public-key-infrastructure
and: https://help.axis.com/en-us/axis-os-hardening-guide#signed-video