RE: [dvd-discuss] Microsoft Reader encryption broken too

[Richard Hartman <hartman(at)onetouch.com>]

> -----Original Message-----
> From: Harold Eaton [mailto:haceaton@hotmail.com]
> Sent: Tuesday, September 04, 2001 3:13 PM
> To: dvd-discuss@eon.law.harvard.edu
> Subject: RE: [dvd-discuss] Microsoft Reader encryption broken too
> 
> 
> Richard Hartman wrote:
> 
> >I don't think you've read that correctly.  If the TPM
> >fails to permit access because of damage.  Well, if you've
> >not damaged the DVD sufficiently, access will still be
> >granted.  If you _have_ damaged it sufficiently, the TPM
> >doesn't matter a damn because the bits are gone and you
> >can't read the source material anyway.
> 
> Umm, no.  You could damage only the title keys (or even
> a specific title key) on the DVD disc, and then CSS will
> no longer provide access, but Franks direct attack will
> provide access...
> 
> 

Hmmm... strictly speaking, things like the region
coding are NOT part of CSS (the encryption technique),
they are merely contractually tied together.

Now ... could we claim that that British DVD I bought
over the internet is obviously damaged, since it will
not play on my DVD player ... classifying the organization
of bits that designates "region 2" as "damage" since it
is clearly not "1" as it should be?  Since those bits are
not part of the TPM (CSS), but they do prevent access ... 
it's "damage", right?

(I think I sound like I'm babbling ... I hope somebody
can see what I'm trying to say and offer a more rational
opinion about it ...)

-- 
-Richard M. Hartman
hartman@onetouch.com

186,000 mi./sec ... not just a good idea, it's the LAW!