Re: Demontage en regle

Proverbe: "Il n'est pire aveugle que celui qui ne veut pas voir..."

http://www.google.fr/search?q=cache:www.trustedcomputing.org/docs/1(...)
Cryptographic
hashing is employed to extend trust
from the BIOS to other areas of the
platform, in the following simplified
sequence:
1. The PC is turned-on.
2. The TCPA-compliant "BIOS Boot
Block" and TPM have a "conversa-
tion."This attests that the BIOS can
be trusted.
3. BIOS queries to ensure that user is
authorized to use the platform.
4. The BIOS then has a "conversa-
tion" with the operating system
(OS) loader and the TPM. This
attests that the OS loader can be
trusted.
---------------------------------------------
1.2.5 Initial Program Loader (IPL)
Start of informative comment:
This is the code that executes during the Post-Boot state. The purpose of this code is to load the
Post-Boot environment.
End of informative comment
page 9 du pdf PC
-------------------------
http://www.trustedcomputing.org/docs/TCPA_PCSpecificSpecification_v(...)
Entities to be Measured:
· Each IPL that is attempted and executed.
page 20 du pdf
---------------------------
2.1.2 Transferring Control
Prior to transferring control an executing entity MUST measure the entity to which it will transfer
control.
pdf PC
------------
page 24 PC
In general, any
code that is loaded and jumped to from the BIOS must be hashed and extended into PCR[4] prior to
turning control of the system over to that code. The BIOS MUST not hash any data areas.

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