Warning! Copy Controlled Cds On The Loose

[Jibbler]

Originally posted by fr600@23 September 2003 - 16:33
I think there aren't any cd that can't be played on the computer...

Let me help explain something I touched on before. These copy protections that are being described are already in effect. This is nothing new. Ill Nino - Confessions, APC-Thirteenth Step, and many more have copy protection. Let me explain how this works.

The format of a CD Player (hardware) has not changed since its inception. The laser must read the disk using the existing software that is already encoded into the machine. Simple enough? Basically, it means there are way of making the disks encrypted or "uncopyable", but these methods do not apply to simple CD players like you would find in your home.

However when a disk of any kind is put into your computer CD player, it is read differently. There is a data track on the disk that the computer streams before playing the music. This data track includes a command line which tells your computer that the disk is copyrighted. Within just a mere second, it can interpret this code, and protect the disk with file encryption software so that it cannot be copied. The "scene rips" that are being spread around the internet, are generally done by sophisticated groups of programers who actually "reverse engineer" the copy protection, decode the data digitally, and create mp3s for you. There are already over a dozen different types of copy protection. With enough time on your hands, you can find programs on the web that will allow you to "crack" the protection, but this makes it extremely difficult for the average user.

Has anyone learned anything here?

[Jibbler]

Originally posted by benn19uk@23 September 2003 - 16:55
There are CD's that can't be played on a PC, but that doesnt matter... Just play the Cd in a noraml Cd player, connect the headphone socket to the line-in on your soundcard and record the result... The quality will still be fine (practically perfect if you've got optical ins and outs on the equipment) and the time it takes to record is going to be easy to predict... It'll be whatever the length of the track is...
Now go out, and find me a CD that you can't turn into MP3's that way...

As I mentioned earlier, this method does work, however you are not getting a digital quality CD rip. This is called a "line in" rip and it degrades the sound quality considerably. You might as well buy an audio tape and make an mp3 from that.

[butsiethesungo]

well that just ruffles my feathers. this is just another reason for me to not buy cds. anyone know any websites that have f*** the riaa and save kazaa merchandise, like shirts and stickers? looks like i may have to pull my old save napster shirts out of my closet. hehe. i plan to wear them when we talk about computer piracy in my criminal justice class.


the butsie

[Rappy]

i don't know if this is the same but a while back a copany tried to release copy protected cds and people found that if they take a marker and wrote on the edge of the cd it would copy i don't know if these are useing the same technology

[Gre1]

They have been releasing these cd's I just remembered that I think Eminem's last cd is I should put it in and see.

[RealitY]

Originally posted by bryanskrantz@23 September 2003 - 16:38
I really don't think just making an image file is going to work. the only thing it does is it makes an image of what is already on the decrypted CD.

Actually it does...
Drawback is a 700mb file...

at the moment I'm listening to In-A-Gadda-Da-Vida by Iron Butterfly

What about the Slayer version...

Anyway this old news...
Copyproof - April

[Switeck]

I heard about audio CD copy protection over 2 years ago and computer CD copyprotection a couple years before that.

Back in the 'early days', EZ CD creator would crash/burn a coaster of copyprotected games -- but Nero would burn a working copy without even a hint there was a problem...

Jibbler:
"However when a disk of any kind is put into your computer CD player, it is read differently. There is a data track on the disk that the computer streams before playing the music. This data track includes a command line which tells your computer that the disk is copyrighted. Within just a mere second, it can interpret this code, and protect the disk with file encryption software so that it cannot be copied. The "scene rips" that are being spread around the internet, are generally done by sophisticated groups of programers who actually "reverse engineer" the copy protection, decode the data digitally, and create mp3s for you. There are already over a dozen different types of copy protection. With enough time on your hands, you can find programs on the web that will allow you to "crack" the protection, but this makes it extremely difficult for the average user."

I have NEVER heard of a CD copyprotection scheme that works in that method, however that is similar to how DVD CSS works at the DVD drive's HARDWARE level.

Audio CD 'copyprotection' usually consists of adding a data track with some/much unreadable/bad sections to it -- the computer CD-rom/burners try to get track info for all the tracks and have problems while audio cd players which only read audio tracks ignore the data track.

Another method is using the error correction schemes in players against them:
An audio cd player isn't looking for exact digital data, it just tries to read something and continues on if it encounters an error.
A computer CD-rom/burner on hitting an error tries to get a perfect digital copy and goes back to re-read that data section, even slowing down to 1x speed to do so -- on failure, it MAY continue or may not depending on specific brand-based behavior of error correction.

On PC game CDs there's even a 'stutter' 1-0-1 bit combination that causes computer CD-rom/burners fits to create exact CD duplicates. Pioneer CD burners can do it, but SONY re-engineered (with firmware updates -- which prevent restoring to an older firmware) their older burners so they CAN'T and makes all NEWER burners so they can't.

[Jibbler]

Originally posted by Switeck@25 September 2003 - 14:44
I have NEVER heard of a CD copyprotection scheme that works in that method, however that is similar to how DVD CSS works at the DVD drive's HARDWARE level.

Well, you better do some reading. The technology isn't new, however this article describes the first actual application of it for store bought CDs. Its called "Second Session" CD recording, and it allows a second data track to be written to the disk which only a computer can "see" and "interpret".

Yahoo news article describing new CD pressing technology

[Switeck]

Originally posted by Jibbler+25 September 2003 - 15:03--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (Jibbler @ 25 September 2003 - 15:03)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-Switeck@25 September 2003 - 14:44
I have NEVER heard of a CD copyprotection scheme that works in that method, however that is similar to how DVD CSS works at the DVD drive&#39;s HARDWARE level.

Well, you better do some reading. The technology isn&#39;t new, however this article describes the first actual application of it for store bought CDs. Its called "Second Session" CD recording, and it allows a second data track to be written to the disk which only a computer can "see" and "interpret".

Yahoo news article describing new CD pressing technology [/b][/quote]
It doesn&#39;t do this:
"This data track includes a command line which tells your computer that the disk is copyrighted."

There is no &#39;command line&#39; at the CD-rom level or the basic hardware drivers level for CD-roms in Windows.

And in fact it&#39;s the AUDIO CD tracks that were &#39;unreadable&#39; on the PCs, the (main) data track was readable just fine.

Perhaps you&#39;re confusing this with Windows CD autoboot? ...which ANYONE who has any sense disables to prevent this shit.

[Jibbler]

Originally posted by Switeck@25 September 2003 - 16:59
It doesn&#39;t do this:
"This data track includes a command line which tells your computer that the disk is copyrighted."

There is no &#39;command line&#39; at the CD-rom level or the basic hardware drivers level for CD-roms in Windows.

And in fact it&#39;s the AUDIO CD tracks that were &#39;unreadable&#39; on the PCs, the (main) data track was readable just fine.

Perhaps you&#39;re confusing this with Windows CD autoboot? ...which ANYONE who has any sense disables to prevent this shit.

I was paraphrasing, or trying to explain the facts of the article. However, if you read it closely, you would have seen this: In CD players, the disc plays normally. When put into a Macintosh or Windows PC, the disc installs software to keep the music secure, and an interactive menu pops up with several links, including one to copy some or all of the Windows Media tracks to your hard drive.

It can&#39;t get much clearer than that. If you put the disk in, you cannot play it without first installing the software which allows the WMA version of the file to be read. Are you reading the same article that I am? Disabling the "autoboot" won&#39;t allow the disk to be copied. Some sort of command line or code had to be written for the disk to do that.