The new hardware generation that comes along, together with Windows 8, features UEFI Secure Boot. This boot feature was originally designed to make sure that no harmful code infects the system in its most vulnerable phase during boot where no anti-malware tool is active.
However, which looks good on the first thought turned out to be a real problem for all of us using open software like Linux.
UEFI Secure Boot will only boot operating systems which bootloader are signed with a trusted key. Those keys need to be stored in the hardware (BIOS) to ensure its integrity during boot. For security reasons, this hardware key storage is read only to omit harmful code of compromising the stored keys. This means that, all the keys need to be stored there during hardware production.
As it looks today, the only key which will be present in the hardware of the future will be the one of Microsoft.
To be able to still boot a Linux system, the Linux bootloader needs to be signed by that Microsoft key. Microsoft offers a signing service for less than $100,- – so some of the major Linux distributions consider using this signing service to get their boot loaders accepted by newer hardware.
But is this really the right way to go?
Of course, this is the most pragmatic solution to the problem. But I see two heavy drawbacks that could hit the distributors and users in the future:
Using the Microsoft signing service puts the whole Linux community in a situation where they are highly dependent on Microsoft. That can’t be a comfortable situation for any Linux distributor.
The second problem I see is with self compiled kernels. A main benefit of open source software is the ability to modify and change it to someone’s requirements. If we can only use MS signed kernels and bootloaders any more, we are not able to compile our own kernels.
In my point of view, the big Linux distributors should better work to get their keys into the hardware as well and should provide a decent and easy to use signing service for self compiled kernels. Or, UEFI Secure Boot should be optional at all to let the user decide the risk he is willing to take to run the software of his choice!