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iPod Cracked, But Does it Matter?
According to an Associated Press story, "DVD Jon" Johansen is planning to market a technology for cracking the copy protection on songs purchased from Apple's iTunes Music Store.
This technology will probably be much discussed in the press as the release date draws nearer, but it's a case of using a flame thrower to kill a fly. It's already possible to convert Music Store songs to MP3 without even using any functionality outside of iTunes.
Apple doesn't make this easy to find, of course, and in fact tries to make it look impossible -- if you set your preferred import format to MP3, then right-click on a song in your iTunes "Purchased songs" list and click "Convert selection to MP3", you get the error: "[song name] could not be converted because protected files cannot be converted to other formats". But you can easily burn a series of songs to a CD, then select the songs on the CD and import them into MP3 format. (Of course, if you don't like wasting a writable CD each time you convert your songs, then wait until you've purchased a few more songs and convert them all at once.) All of this is based on core iTunes functionality, which won't go away unless Apple decides to stop letting users (a) burn CDs or (b) import CD songs as MP3 files, neither of which is likely.
But suppose Apple does manage to block this path. (The easiest way I can see would be to write a hidden code on each CD burned from protected songs with iTunes, so that iTunes would refuse to re-import that CD into an unprotected format. Users could re-import the songs with another application, but at least they'd have to open two programs!) You can still use a program like Total Recorder that can capture any sound output on the computer and save it to an MP3 file.
And even if it ever becomes possible for the audio playback application to seize control of the operating system in order to stop programs like Total Control from working, you can always connect a portable MP3 recorder to the audio output of your computer.
It's a common misconception that if a copy-protection algorithm gets broken, it must be because the encryption was too weak or the algorithm was flawed. But the Achilles heel of any such copy-protection scheme is that in order for the content to be playable, the playback program has to "break" the encryption every time, in order to play it. If the content is encrypted using a key, the key has to be stored on the user's computer where the playback program can find it. (If you didn't have to store the key along with the encrypted content, you could use encryption algorithms that are believed to be impossible to break with today's computers, by 15-year-old Norwegians or anybody else.) But even though every copy-protection algorithm is breakable in principle, it's usually easier just to capture the content as it's played back, which is what the previous examples do.
Logically, I think the only algorithm that would help to fight music piracy would be one that embeds a unique "fingerprint" or "watermark" in each downloaded copy of a song -- in the audio itself. A good fingerprint would have these properties:
- it should not be noticeable enough to interfere with the user's enjoyment of the song
- it should not be possible to copy the song in a way that destroys the fingerprint, without degrading the song quality and diminishing its value
In the meantime, don't get taken in by the hype around a new way to "crack" the existed restrictions on copy-protected song files. They were never really protected.
Is anyone really surprised by this?
DRM is such a futile idea that the only way it would be possible would be to lock down consumer electronics so badly as to make them virtually function free.
We call that the theatre or a live performance.
Tom
Someday, I'll have a real sig.
He is going to market a way for COMPANIES OTHER THAN APPLE to create copy-protected content that is playable on the iPod. None of the crap you just wrote is in any way relevant to what he is up to.
You lose quality if you first convert audio from digital to analog, and then sample it again. But in the age of "CD quality" 128 kBit MP3s and crappy PC speakers, who cares about audio quality anyway...
I read most of the article and it discusses breaking drm on music purchased on iTunes. Can someone explain what this has to do with cracking the iPod?
It's clear that Bennett didn't even bother READING the article that he's supposedly using to back up his claims. Nowhere in that article does it talk about DVD Jon (or his company) selling a tool to crack the iTunes encryption. However, what it does talk about is DVD Jon's company selling a tool that will allow other music retailers to encrypt songs that they sell in the format that is used by iTunes and the iPod.
Remember kids, Reading Is Fundamental!
This guy's the limit!
One common misconception I've come across on Slashdot a lot is that security is either open or shut. An algorithm is either secure or broken. This is not how security works, and a couple real-life examples demonstrate this. You lock the doors on your car, but someone can still just break the window to gain access. But this doesn't mean locking the doors is meaningless, it makes it harder (or more risky) for a thief to gain access to the contents of your vehicle.
The same thing applies with iTunes. The question isn't "is it possible to strip DRM", but "how easy is it to strip the DRM". I don't think, for example, that being able to burn to a CD or capture audio output is practical for most people. I have over 40 GB of music. A lot of it is burned from my CD collection, a lot of it is from my wife's collection, and some of it is downloaded from iTunes. So I've got well over 8,000 files and of those a couple hundred are DRM-protected. I honestly don't know which at this point. For me to DRM-strip them using either of those methods is going to be like a day-long project that, frankly, I don't have time for. In addition to that, I'm not sure about the sound-quality degradation in converting from MP3 to audio CD and back to MP3. Or about going from digital to analog back to digital. In any case, it would be pain in the butt to go through my entire library, and I may not be able to practically avoid some quality degradation. Yeah - DRM is already "broken", but at what cost?
If the result of DVD Jon's crack is a program what will go through my iTunes library and batch process the files to strip any DRM automatically, then we have something on our hands that matters. In addition, there are a lot of additional potential applications for DRM-stripping to make music automatically portable across various music players. If my library was nothing but vanilla MP3s with no DRM, then it wouldn't realy matter if I accessed it with iTunes (for an iPod) or Windows Media Player (for various wannabe iPods).
The effect of DRM is not to make it impossible to move your music around, it's to make it inconvenient. Convenience is not a side-issue for digital music. It's the issue. Otherwise we'd all just carry around CD players and 500-disc CD wallets. The digital music industry exists because of convenience, so any approach that not only circumvents DRM but does it painlessly is a significant improvement over DRM-skirting strategies that require additional effort from the consumer.
-stormin
The Southern Baptist Convention has creationism. On Slashdot, we have porn.
Not only did both the submitter and the editor get wrong what the guy was actually planning on marketing, the whole thing was followed by an uninformed and irrelevant rant about watermarking. What's the problem, guys? Are mere dupes getting boring?