 |
|
|
|
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Mike Raiford wrote:
> See? This is what happens when you live under a rock ... Car radios get
> more sophisticated, and can load up more than 10 albums to a single CD,
> and people actually buy music off the internet, and you seem not to be
> aware of these (not so) recent innovations.
Hey, *I* buy music off the Internet. I just have to wait for a small
piece of silvered plastic to arrive in the post afterwards. ;-)
>> So, how have they solved that apparently unsolvable problem then?
>
> Well, the data is encrypted, of course, encryption is meant to be broken
More precisely: The encryption *must* be removed in order to *play* the
music. Therefore, this encryption must be trivially breakable, and
therefore it cannot prevent anybody pirating the music.
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
"Invisible" <voi### [at] dev null> wrote in message
news:47ac757e@news.povray.org...
> Warp wrote:
>
> >> So, what, you only listen to illegal music?
> >
> > Only illegal music can be transferred over the internet?
>
> As a technological matter - no.
>
> As a practical matter - I'm not aware of anybody who permits you to
> obtain MP3s legally. (Or at least, MP3s of commercial music anyway.)
Amazon. Apple. To name just 2
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
that's a huge big pile of ... ;)
Except perhaps for Kraftwerk.
Beethoven, Mozart, Bach, Chopin and company are spread throughout my CDs and
brand-new HD...
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Invisible wrote:
> More precisely: The encryption *must* be removed in order to *play* the
> music. Therefore, this encryption must be trivially breakable, and
> therefore it cannot prevent anybody pirating the music.
Encryption, if it is decryptable, is therefore trivially decryptable?
Here kid, tell me what's in this file *without* knowing the key.
--
Tim Cook
http://empyrean.digitalartsuk.com
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
> Mike Raiford wrote:
>> CDs are old fashioned because people buy and download their crap music
>> to their iPods now (those fashionable white boxes you see various
>> teenagers walking around with) Music on CD has gone the way of the LP
>> record. :)
>
> Really? I wasn't aware it was possible to do that legally yet... oh,
> wait...
Yep, there's iTunes store and others, where you legally buy the digital
files. With DRM of course...
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Tim Cook wrote:
> Invisible wrote:
>> More precisely: The encryption *must* be removed in order to *play*
>> the music. Therefore, this encryption must be trivially breakable, and
>> therefore it cannot prevent anybody pirating the music.
>
> Encryption, if it is decryptable, is therefore trivially decryptable?
>
> Here kid, tell me what's in this file *without* knowing the key.
If you can play it, you must have the decryption key. Encrypted data
with the key right next to it might as well not be encrypted at all...
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
nemesis wrote:
> that's a huge big pile of ... ;)
Yes, that's roughly the response I was expecting. :-P
> Beethoven, Mozart, Bach, Chopin and company are spread throughout my CDs and
> brand-new HD...
I like Bach. I wouldn't recognise any of the others...
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Orchid XP v7 <voi### [at] devnull> wrote:
> If you can play it, you must have the decryption key. Encrypted data
> with the key right next to it might as well not be encrypted at all...
In some situations it's not that simple.
For example the PlayStation Portable supports running programs from
the flash memory card directly (instead of the optical disc), but only
ones approved by Sony. It will refuse to run anything else.
How does it achieve this? Why can't people just write programs for the
PSP, load them into the memory card and run them? Because the PSP only
runs properly encrypted binaries.
Of course in order to run them it needs to decrypt them, and to decrypt
them it needs a decryption key. Couldn't this key just be read from the
PSP's memory and use to encrypt third-party programs? The answer is: No.
The decryption key can be read, but it cannot be used to encrypt the
programs.
Thus encryption in this case works, even though the decryption key is
right there in the ROM of the device.
(Yes, third-party programs can be run on PSP, at least ones with older
firmwares, but that's achieved by exploiting some bugs, ie. programming
errors in these older firmwares. For my point it's irrelevant.)
Of course in the case of music you don't need any encryption key, as
the decryption key is enough to do what you want. The only way to protect
that is to protect the decryption key and the decryption process in such
way that you can't get hold of it. Basically you would need a black box,
which is the music player, which cannot be looked inside. That's, in fact,
what the music industry is aiming towards, even if this "black box" is
inside the user's PC or handheld device.
Of course encryption doesn't patch the analog hole.
--
- Warp
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Orchid XP v7 escribió:
> Tim Cook wrote:
>> Invisible wrote:
>>> More precisely: The encryption *must* be removed in order to *play*
>>> the music. Therefore, this encryption must be trivially breakable,
>>> and therefore it cannot prevent anybody pirating the music.
>>
>> Encryption, if it is decryptable, is therefore trivially decryptable?
>>
>> Here kid, tell me what's in this file *without* knowing the key.
>
> If you can play it, you must have the decryption key. Encrypted data
> with the key right next to it might as well not be encrypted at all...
The key is hidden on iTunes, or something it gets by mixing some data
from your iTunes account and something hidden in iTunes.
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
| |
|
|
Orchid XP v7 <voi### [at] devnull> wrote:
> nemesis wrote:
> > that's a huge big pile of ... ;)
>
> Yes, that's roughly the response I was expecting. :-P
>
> > Beethoven, Mozart, Bach, Chopin and company are spread throughout my CDs and
> > brand-new HD...
>
> I like Bach. I wouldn't recognise any of the others...
Yes, that's roughly the response I was expecting. :-P
Post a reply to this message
|
|
| |
| |
|
|
|
|
| |
