And perhaps most importantly: it is a reminder that demands by politicians and crimefighters for special keys, which can be used by investigators to unlock devices in criminal cases, will inevitably jeopardize the security of everyone.
[...]
It's akin to giving special secret keys to the police and the Feds that grant investigators full access to people's devices and computer systems. Such backdoor keys can and most probably will fall into the wrong hands: rather than be used exclusively for fighting crime, they will be found and exploited by criminals to compromise communications and swipe sensitive personal information.
Anyone who thinks government servers holding these keys are safe need only be reminded of the OPM megahack; anyone who thinks these keys cannot be extracted from software or hardware need only spend a weekend with a determined reverse-engineer and a copy of IDA Pro.

http://www.theregister.co.u...ecure_boot_ms16_100/