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Subject: Re: audible files ont he IPod

Re: audible files ont he IPod

From: Peter C. Gravelle <>
Date: Sun, 9 Jul 2006 01:47:17 -0400

Actually, in the special case of DRM, the usual axioms of cryptography do
not hold. You see, in the case of DRM, you are giving away both the
cyphertext and the key -- the only thing that remains secret is the
algorithm, which you also have to give away in order for the files to be
played back. See Cory Doctorow's talk on the subject at


On 7/8/06, Paul Louden <> wrote:
> Actually, a truly strong encryption should be safe with the decryption
> algorithms opened up (GPG for example). The strength should lie within the
> secret kept by the person who is meant to decode the file (your key). But
> most people believe that obscurity helps increase security, or think that
> opening their encryption algorithms will make it easier for people to pirate
> the audiobooks or audio files. While this is possibly true, in the end
> people find a way no matter what.
> On 7/8/06, Stephan Seitz <> wrote:
> > On Sat, Jul 08, 2006 at 10:00:26PM +0100, will wrote:
> >that is unfair though as the original firmware of some players does
> >workw ith it, so why can't rockbox?
> Because Rockbox is free and every part of Rockbox including all codecs
> must be free as well. Free means you must be able to see and get the
> source code. Which means, that the encryption of those files would be
> quite useless, if everyone could get at least the source code to decrypt
> them.
> The original firmware is not free, and no source code is available, so it
> can do things, that Rockbox can't.
> Simply don't support those non-free crap.
> Shade and sweet water!
> Stephan
> --
> | Stephan Seitz E-Mail: |
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> =Fn36
Received on 2006-07-09

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