*countable infinities only

Michael Scherer misc at zarb.org
Thu Jun 14 22:00:03 UTC 2012


Le jeudi 14 juin 2012 à 16:52 -0400, Jay Sulzberger a écrit :

> Therefore everything
> is OK, even if in a couple of years, Fedora is completely locked
> out of all ARM devices.  In particular, because Microsoft and the
> hardware vendor say everything is OK, anti-trust law does not
> apply.

You may have missed the fact that the vast majority of arm devices on
the market are already capable of being locked without any Microsoft
intervention, or even without Microsoft pushing for it.

Take for a example a popular SOC like qualcomm snapdragon ( popular as
seen on http://en.wikipedia.org/wiki/Snapdragon_(system_on_chip) )
If you take a look on the boot process
( http://tjworld.net/wiki/Android/HTC/Vision/BootProcess ), you will see
that it already use a system like secureboot, except that instead of
having a interface to disable it, the key are in the chipset, and cannot
be disabled if a fuse is blown.
This date back to 2008 ( first sample of the SOC in 2007 ), and if you
do not believe me, just search on the web for "MSM7225 qfuses", msm7225
being the first chipset of the snapdragon family, and qfuses being the
name of fuses to blow to activate "secure enable boot" on the SOC ( and
by "blowing fuse", understand "irreversibly" ). Chances are high that
you will find technical documentations that explain it.

-- 
Michael Scherer



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