Re: A _good_ and valid use for TPM

[phcoder <phcoder@gmail.com>]

> The hard part is initializing the hardware without the use of the
> original BIOS - the specifics of initializing various chips are not
> public, and probably depend on companion hardware and/or trace length
> on the particular board as well.
It's not actually needed. If one can nop tpm code in bios then he can 
boot from anything and read tpm keys. You don't need to understand the 
whole bios to do it. Of course it's obfuscated but obfuscation isn't a 
security in any way. Also if you write completely different code to 
flash bios you don't need to be able to initialise the whole hardware 
all you need is being able to read tpm and write to serial port. Then 
you can simply read the key at your serial console. Actually bios isn't 
protected. It's just obfuscated.
Regards
Vladimir 'phcoder' Serbinenko