On 2012-01-19 10:16, Frank Cusack wrote:
> On Thu, Jan 19, 2012 at 1:10 AM, Anders Rundgren <anders.rundg...@telia.com 
> <mailto:anders.rundg...@telia.com>> wrote:
> 
> 
>     This is since long solved problem.  It is an intrinsic part of 
> GlobalPlatform
>     where you don't really use CSR's and PoP's but a session-key to secure 
> that you
>     are really talking to the card.
> 
>     On http://webpki.org/auth-token-4-the-cloud.html
>     you can find a lot of material on a system that takes this concept to
>     a new level by making the entire provisioning session a transaction.
> 
>     I hope to present it on FOSDEM but I haven't heard from Martin yet...
> 
> 
> Cool.  Intel has a similar process for their (non-GP I think) devices.
> 
> Even generically, could SM be used for this?  (Or is that in fact what
> you are referring to?)  It means the CA, not the user, is interacting
> with the card, which might even be a good thing.

Indeed I was referring to SM.  The big thing is really how the session
key is created.  Most cards use static symmetric keys but this is a bad
solution; SKS uses a combination of ephemeral ECDH keys and a separate
attesting card PKI for this purpose.

-- Anders


> 
> Someone emailed me privately mentioning SM but I told him he was incorrect 
> since the CA wasn't part of the SM session.  Maybe that's what he meant.

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