The EK is certainly the closest thing you'll find to a unique TPM ID;
it's not *quite* one-to-one with TPMs, but it will be in normal usage.
That said, whether hashing it is the correct answer for your system
depends a lot on what your goals are. If you're just looking for an
identifier with no proof attached? Sure, that's fine. If you're going to
want to prove that, say, a licensed machine is the one contacting your
central server, you probably want to use identity keys instead so
that you can actually sign a response or get a quote about current
machine state. Identity keys are not unique per TPM, but they *are*
unique *to* a TPM, and will serve just as well or better for almost all
applications.
Ariel
On 11/26/10 12:59 AM, Evgeny Bronnikov wrote:
> Hello.
>
> I need to get unique TPM ID for implementing software licensing system.
> Now I use SHA1 digest of public EK. Is it good idea? Are there any
> other ways to get unique TPM ID?
>
> Thanks in advance,
> Evgeny
>
> ------------------------------------------------------------------------------
> Increase Visibility of Your 3D Game App & Earn a Chance To Win $500!
> Tap into the largest installed PC base & get more eyes on your game by
> optimizing for Intel(R) Graphics Technology. Get started today with the
> Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs.
> http://p.sf.net/sfu/intelisp-dev2dev
> _______________________________________________
> TrouSerS-users mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/trousers-users
------------------------------------------------------------------------------
Increase Visibility of Your 3D Game App & Earn a Chance To Win $500!
Tap into the largest installed PC base & get more eyes on your game by
optimizing for Intel(R) Graphics Technology. Get started today with the
Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs.
http://p.sf.net/sfu/intelisp-dev2dev
_______________________________________________
TrouSerS-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/trousers-users
