Re: Circumventing/Emulating Fritz-chips

[Jonathan S. Shapiro]

On Tue, 2006-05-09 at 11:39 +0200, Pierre THIERRY wrote:
> Scribit Farid Hajji dies 08/05/2006 hora 17:29:
> > We're talking Fritz-chip here, right? Its specs are available; and you
> > can code against that specification.
> 
> But there is a secret pair of cryptographic keys in there, which no
> reverse engineering or spec can directy show.

It is true that there is a secret key inside.

There is some reason to believe that the key can be extracted at a cost
between $10,000 and $20,000 (US) in the current deployments. Note that
this is the cost to crack **one machine**, not the entire scheme.

shap