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'[OT]:: AACS HD DVD DRM system bypassed'
2007\02\18@174627 by Russell McMahon

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The following report does not, as far as I can establish, describe an
illegal or immoral activity and as such it is potentially suitable for
publication on this list. There is no doubt that it does describe an
activity that numerous people with large fortunes and the best lawyers
that money can buy would rather people didn't talk about or know
about.

A person who would have qualified for a job in a hut at Bletchley Park
in another era has worked out how to de-DRM all existing ASCS HD DVDs
by the establishment of the existence and value of a single
"processing key" common to all such material to date. Very
importantly, in his (presumably) (women usually have better things to
do with their time) own words:

                   Nothing was hacked, cracked or even reverse
engineered
                   btw: I only had to watch the "show" in my own
memory.
                   No debugger was used, no binaries changed.

Even if you have no interest in the de-DRMing of AACS HD DVD format
material you may find the following account of how it was achieved
interesting. I find it of interest that there are people with this
degree of comfort with the arcane workings of such systems willing to
spend the time and effort that this person has sifting through other
people's flawed attempts to make material uncopiable. Turing would
have been impressed.

While this system reportedly works to de-DRM all existing material it
can be defeated by changing the processing key in future releases.

       http://forum.doom9.org/showthread.php?p=952968#post952968

Also copied to here:

       http://www.others.servebeer.com/misc/aacsdrmprocessingkey.htm

I'd be interested in knowing if the first of these stopped working at
some stage. I imagine I'll know if the second one does :-).

I do not support or encourage illegal and immoral activity and may
even choose to work against such where it seems appropriate. However
immoral and illegal are not the same (but often overlap) and then
there's the whole other category "we don't want you to but have no
moral or legal foundation for wanting this but we'll try hard to
achieve it anyway".

I have no problems at all with people attempting to protect their own
"intellectual property rights".
However, I am exceedingly annoyed at the manner in which DRM systems
tend to trample all over the landscape and make what are or morally
should be * attempts to do quite reasonable things hard or essentially
impossible.

I have little doubt that the major use that the above information will
be put to will be illegal and immoral. It's use need not be either
illegal or immoral. It is entirely possible that I will use this
information in future and, if I do, it's use will be at least moral
:-). I am about to de-DRM some music for a friend, confident in the
knowledge  that doing so is 'the right thing to do' [tm] and that it
will not in any way disadvantage those who applied the DRMing
initially, and that the ability to remove DRM will quite possibly lead
to the person concerned buying more and not less DRM'd material in
future.






           Russell



* the meaning of terms and concepts "morally" and "should be" and
related terms above are not liable to be able to be agreed to by all
involved :-).



2007\02\18@190407 by Bob Axtell

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Russell McMahon wrote:
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Good comments, Russell.

2007\02\19@042531 by Tony Smith

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> all such material to date. Very importantly, in his
> (presumably) (women usually have better things to do with
> their time) own words:
>
>     Nothing was hacked, cracked or even reverse engineered
>     btw: I only had to watch the "show" in my own memory.
>     No debugger was used, no binaries changed.


Sounds like Fahrenheit 451 for the video age.  Ignition point of a DVD
anyone?

Tony

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