>> There are also open source Trusted Execution Environment (aka TrustZone)
stacks.  NVidia has one called Trusted Little Kernel...

Correct. TLK is a "FOSS TrustZone software stack" and not necessarily
called a TEE (though it does implement a TEE.) The distinction might seem
academic, but is useful to note: TEE may seem to indicate implementing a
specific set of APIs (e.g. those proposed by the www.globalplatform.org),
whereas "TrustZone software stack" is meant to indicate that one could have
a wrapper to implement a GP TEE, or may choose to have a software TPM
instead, or both (or even another runtime altogether) within the carveout
on the underlying core (the so-called "Secure World".) I've presented TLK
in a couple of events and am happy to respond if there's interest.

Cheers,
-Hadi


On Wed, Mar 19, 2014 at 3:10 PM, Carlton Northern <
[email protected]> wrote:

> Yes, the Trusted Computing Group is currently developing a spec that will
> enable a firmware TPM to reside in a protected environment such as ARM
> TrustZone.  This is a deviation from normal implementations of TPMs that
> usually require a discreet chip.  As such, the spec is taking longer than
> expected to be published.  Hopefully it will be published in the next 3
> months.
>
> There are also open source Trusted Execution Environment (aka TrustZone)
> stacks.  NVidia has one called Trusted Little Kernel and I believe there is
> another one called Open Virtualization.
>
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