On Wednesday, December 11, 2019 7:09:41 PM MST Kevin Kofler wrote:
> John M. Harris Jr wrote:
> 
> > To clarify a bit, the most common method of extracting a key from a TPM
> > has been to simply desolder the TPM from the system and solder it onto
> > another system. This works with the popular implementations.
> 
> 
> Surely that is not a process that you want to advertise to end users!

Of course not. It's just an example of the most common way to get around the 
TPM holding the keys.

> I stay by what I wrote: a TPM, or anything with the same security model, is
>  not an acceptable place for a LUKS key token. Either use a plain keyfile
> on a removable USB mass storage stick, or if that does not provide
> acceptable security in your setup, find another solution (such as a
> passphrase). 

Agreed, as it's simply susceptible to attack at too many levels.

-- 
John M. Harris, Jr.
Splentity

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