If the BIOS can't see it, then no bootloader in the world will be able to boot off it, that I'm aware of. You could certainly write one, but it would require including enough PCI and firewire support ...

I only know that secure boot is a feature that checks the system bootloader is properly signed by something/somebody authorized to do so. So it would make sense that ...

c't has reported several times on the current security problems surrounding UEFI Secure Boot. Microsoft's multiple changes to the plan have led to many questions. Here we answer some of the most ...