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Anatomy of Cactus Data Shield

meehawl writes: "This is a good analysis by CDRInfo on the current version of Midbar's Cactus Data Shield. This is the format Universal will use to protect its new audio CDs. It's been reported here already that some DVDs effectively bypass this protection, but this article addresses the specific concerns of how best to backup these protected CDs, and how to extract the music data at high quality for download to a personal MP3 listening device."

19 of 182 comments (clear)

  1. Whats the Point? by sargon666777 · · Score: 4, Insightful

    This is really getting old it seems to be a constant battle. They come up with some new means of protection, and we devise a way around it (we as a collective of consumers). They discontinue it, and release a new one, and we work around it again. Besides no matter what they do you can always play it and pipe the sound back in and record it *shrug*. They should just give up and allow people to buy and play the music normally. In the end although there will be some theft they will increase profits becuase I can't imagine anyone will buy these once the word gets out to the general public a bit more. After all who wants a CD you have to fight to play or use in a manner which you have been accustomed when you can jsut buy a good old normal CD. When will they ever learn :-)

    --
    Am I lying when I tell you that im telling the truth? Or am I telling the truth when I say that Im lying?
  2. You've got three choices: by seanadams.com · · Score: 4, Insightful
    • Buy more CDs
    • Steal music online
    • Enjoy the albums you already own
    I'm sticking with #3 until the RIAA gets a fucking clue.

    How can they be so stupid as to think that ANY kind of copy protection will ever prevent their music from getting onto the net? Clearly, they think that someone is sitting there repeatedly dubbing a CD again and again every time something is downloaded. Don't they realize that no matter how difficult they make the initial ripping, it only has to be done ONCE to make a billion copies?

    The only people they're inconveniencing with these tactics are guys like me who would otherwise have paid for the material. It doesn't make it any harder to download the file off gnutella.
    1. Re:You've got three choices: by captaineo · · Score: 3, Insightful
      I agree... The content companies need to realize that it is now impossible to regulate access to copyrighted works. No matter how hard they try, they will not be able to prevent people from giving unauthorized access to others.

      But here is the key - access is only part of the value the content companies provide - there are also things like convenience (how easy is it to download one particular song or episode of a TV show?), quality (how good is the download bandwidth?), and atmosphere (you can't download the experience of watching a movie in a theatre, or attending a live concert!). Unlike access, these things can't be transmitted across a P2P network...

      Only once companies wake up to the fact that preventing unlicensed access is a lost game, and start focusing on non-replicable sources of value, will they be able to accept and profit from the internet.

  3. Re:scratch those cd's! by eclectro · · Score: 4, Insightful



    You can read the mail after it's been irradiated - but forget listening to these CDs in your computer unless you happen to have the right CD ROM in your computer.

    I suspect that computer CDROM players will become "smart" and eventually this copy protection will be thwarted. Expect to see some DMCA lawsuits against the manufacturers that make them though.

    Meanwhile, all computer users who want to play music on their computer get burned.

    One can only hope that there is enough backlash from consumers that raises awarenes to the issues at stake here. The thing that we have to worry about most is consumer apathy.

    If consuners don't take a stand on this crap before long their going to have deposit quarters into their computer every time they want to listen to a song.

    --
    Take the cheese to sickbay, the doctor should see it as soon as possible - B'Elanna Torres, "Learning Curve"
  4. thinking ahead by athagon · · Score: 5, Insightful

    One would wonder if the record industries/other persons responsible for greater "security" on CDs/DVDs had thought of this:

    With the current system, the following can be done:

    Person A buys CD1. Person A rips CD1 to disk, and distributes MP3s to Person B. Person B likes said MP3s, and buys CD1 for his/herself.

    With "rip proof" technology (at least, until its cracked), however:

    Person A buys CD1. Person A tries to rip CD1, and fails. Person A tells Person B that CD1 sucks because you can't rip it. OR: Person B can't hear MP3s from CD1, so Person B doesn't know whether or not (s)he should buy it, and possibly decides not to.

    With the current system, yes, the industries stand a greater chance of losing money: but they also stand a greater chance (and, as some statistics have shown, this is the case) of gaining more money; given that the majority of Napster users (apparently, and as I did) used Napster to download a few random MP3s to decide whether (s)he should/should not buy CD1. With rip-proof CDs, however, Person A, B, C... won't be able to listen to MP3s from CD1, and thusly won't know whether or not they want to buy it.

    Synopsis:

    It would not seem wise, at least to me, for the industries to err on the side of greater control, and away from the potential for greater sales. Penny wise and dollar foolish, they say...

    --
    I think, therefore, I'm smarter than our president.
    1. Re:thinking ahead by swb · · Score: 5, Insightful

      It would not seem wise, at least to me, for the industries to err on the side of greater control, and away from the potential for greater sales. Penny wise and dollar foolish, they say...

      You're right in suggesting that they want enhanced control. But remember, when you listen to your friend's MP3, decide you like and go out and buy it you're making a purchasing decision about whether or not you like the music based upon your friend's opinion and your personal preferences.

      You're not making it based upon the music industry's marketing campaign. The industry pushes select artists that they have an investment in and want to succeed, and they would rather that you made your decisions on what to buy based upon they're selling, not upon what your friends like or what you find appealing.

      The record companies, as subsidieries of media conglomerates, already have influence over TV, magazines, record stores, and radio stations (through direct ownership or payola). What they don't control is whether your friend tells you about a new disc he got and the music on it.

      I'd agree that it may hurt sales, since a lot of records that have become popular have become popular because of word-of-mouth but I think more and more people are such slaves of the media anyway (radio in shower, in the car, in the office, MTV at home, etc) that many people by and large have lost their ability to generate an opinion of their own anyway.

  5. Come on, guys... by ekrout · · Score: 4, Insightful

    Come on, guys.

    For every technological solution, there's a technological "hack", right?

    Name one anti-piracy tactic employed by any corporation for use in consumer products that has not, is not, and will not continue to be hacked. Still thinking? I thought so.

    Whatever they think of will be hacked in a matter of days (or hours even), no matter how many times or what media/record companies think up a different scheme. If we can get the ones and zeros, then that's it. I'm not sure why more people don't understand this.

    The only question is how long it will take Patti Q. User to get a purdy little Windows app that will rip her new N*Sync CD flawlessly.

    --

    If you celebrate Xmas, befriend me (538
  6. Jargon to English Translation by Skirwan · · Score: 5, Funny
    How does the Cactus Data Shield work?
    Translation: How can I circumvent it?
    As Midbar explains "...The Cactus Data Shield proprietary technology was developed in-house by a multidisciplinary team of experts in the fields of information security, physics, mathematics, electronics, cryptography and algorithms.
    Translation:We got a whole room of smart people who worked on it. Sometimes we race them.
    The technology includes proprietary electronic circuits and software algorithms.
    Translation:It uses computers and stuff. It's like the Jetsons.
    The Cactus Data Shield processor is the engine behind the protection and serves as a platform for encoding original content through robust, multi-layer protection schemes.
    Translation: I wanted to just call it Bob, but the head of marketing has a cactus fetish.
    An engineering solution, the protection schemes are adaptive, easily updated and significantly more robust than software solutions.
    Translation: Even though it's basically done in software we can't say that, 'cause it confuses the VPs.
    The Cactus Data Shield copy protection slightly alters the information on the CD in several ways while maintaining perfect audio quality.
    Translation: We only fucked it up a little.

    --
    Damn the Emperor!
  7. So, if the only CD player I have is a CDROM by pyramid+termite · · Score: 4, Interesting

    ... I can only listen to the music as a 128 bps MP3. Why should I pay 12-13 bucks to do that when I can download 128 bps MP3s for nothing? (And yes, a person who knows how to record from one audio source to a computer can make an MP3 that's indistinguishable from one ripped from a CD.)

    This is a shameless rip-off of the consumer. It's fraudulent, in fact. When I buy a CD, I expect CD quality music, not MP3s. They should have to put a sticker on the case explaining that computer users get MP3 only quality.

    And yes, my only CD player IS a CD-ROM. I won't buy one of these "CDs" ever.

  8. Kind of reminds me of a Star Wars quote... by pxpt · · Score: 3, Insightful

    ...the tighter you squeeze, the more systems (CD sales) will escape between your fingers... well something like that anyway!

    I had bought the new Natalie Imbruglia CD (here in the UK) when it first came out and discovered myself that it was copy protected. I was very annoyed to say the least and managed to return the CD and get my money back. A while later I ordered the unprotected version from BMG and now I have a CD that I can actually listen to.

    There is NO WAY I will intentionally buy any protected music CDs now, or in the future. Music publishing companies will just force copying and distribution of music from these CDs via the channels that they are trying to stop. Duh! why can they not see this?...

    ...Maybe its due to the age old misconception that number of pirated copies equals the number of lost sales! Wrong! Wrong! Wrong!

    The day that all music CDs are protected is the day I will stop buying them.

  9. My first copy-pretection experience by tjansen · · Score: 3, Interesting
    Here is my first experience with a copy-protected cd:
    it was 'Better Days' by JOE (Jive Records/Zomba). I got it from Amazon.de. The only sign that it was copy-protected was a very small printing on the back side "This CD is not playable on computers (CD-ROM/DVD-ROM)". So I tried it on my computer running Linux, with a Creative Dxr2 5x DVD-ROM and I could hear it on audio mode. To my surprise I was also able to rip it using cdparanoia (otherwise I would have returned it immediately, I have far too many CDs to manage them in any for but Ogg Vorbis or MP3 format). So I tried it on my DVD-Player (Yamakawa AVphile 715), and it worked, too. However I noticed that the player needed an unusual long time to detect it as a CD. Next try was my stereo, an old Sony CD player: worked fine as well. Then I tried a Windows PC with a 40x Pioneer CD-ROM: did not detect the CD. Ok, so at least in one cd drive the copy protection worked.


    I thought about the possibility of returning it to Amazon, but I felt bad about the idea of returning a CD that I had already ripped and that worked in most computers, so I didnt do this. I wrote a letter to Amazon.de though, asking them to include information about copy protected CDs in the description and I told them that I would never buy a copy-protected CD, and if I would ever get another one I would return it immediately. They replied, telling that they cannot put this information in the description, but because of the special circumstances I was allowed to return even opened CDs if they are copy-protected.

  10. Further Analisys of a Damn Stupid System: by Romancer · · Score: 3, Funny

    They hope to sell more of these altered CD's that have copy protection, cause less people will use piracy?

    Wait a sec, this sounds too stupid.
    Try to follow a little train of thought that'd probably help
    some executives somewhere in the recording industry:

    Why does someone buy a CD?
    To listen to the music.

    What does the industry do to get more people to buy the CD?
    Not let people listen to the music, by:
    a. limiting the playability
    b. limiting the portability
    c. limiting the quality

    Why do people download MP3s?
    to listen to the music free.

    Why do people upload MP3s?
    to let people listen to the music free.

    What does the industry do about it?
    force us to download the music, by:
    a. Not letting us listen to the CD we just paid for in any of our PCs
    b. Not letting us listen to the CD we just paid for in some of our DVDs
    c. Not letting us listen to the CD we just paid for in some of our cars
    d. Not letting us listen to the CD we just paid for in any of our MP3 players
    'cause we can't get them there

    If I cannot listen to the music from a CD that I just paid for, and I have to go download it off the internet because I cannot easily rip it to an MP3 to play in my MP3 player I am a very small step from not paying for the CD in the first place and just going and downloading the songs for free.
    I can make a regular cd from the MP3s that will play on anything, and the media costs a whole lot less than $9-$18 and I get to pick the tracks!

    Freakin brilliant RIAA!
    Thanks for making my decision so easy!

    Not letting us listen to the music that is the sole reason we paid for the CD, is the most retarded thing I have heard of in a long time.
    People make choices with some consideration to the ease of using the result.

    CD w/ security = Hassle = less are going to choose
    Free MP3 = Easy = more are going to choose

    --


    ) Human Kind Vs Human Creation
    ) It'd be interesting to see how many humans would survive to serve us.
  11. Re:"backup" audio CDs for "personal" use? by Troed · · Score: 3, Insightful
    I rip all the CDs I buy, so that I can transfer the mp3s to work, or just play them through winamp at parties instead of having to switch CDs all the time. Yes, I put the mp3s in my AudioGalaxy shared folder, but that's because it's up to others to judge whether they want to copy them or not.


    I buy more CDs than I download mp3s off the net.

  12. Those who don't learn from history... by martyb · · Score: 4, Insightful

    "Those who don't learn from history are doomed to repeat it." Back in the late 80's it was all the rage by software manufacturers to copy protect their software. (I still have a copy of Lotus 123 from that era.) Various schemes were used:

    • Bad sector(s) on a floppy disk that needed to be present in the drive for the program to run. The disk could not be copied easily using conventional means, but soon people wrote programs to crack the protection.

      Many customers ran into problems when trying to use a legitimately purchased copy as their system reacted differently than expected to the copy protection. The vendors would add increasingly more complicated schemes that never blocked the motivated copier, but DID interfere with legitimate users being able to use the software on certain systems.

    • Printer port dongle that needed to be present in the parallel port. This allowed unlimited copying of the software, but you couldn't run it unless the dongle was in place.

      There was a time when I had a half dozen of these hanging off the back of my PC (imagine 12 inches of dongles sticking out the back; couldn't push the PC against the wall; major leverage against the connector on the PC, etc.) Besides, each dongle interefered somewhat with the timing of the signal going through it... we had a case where a printer attached to the end of the dongle-chain needed to be powered up for the system to boot.

    • Startup questions that required the user to look up a certain value in the documentation and key it in when prompted by the application.

      The thinking was users could easily copy the software, but photocopying the documentation was a much more difficult task that most "pirates" would not go through the effort of doing. I have a game somewhere that came with a "code sheet" printed on red paper that claimed it could not be photocopied. Truly, it was difficult using the black-and-white copiers available at the time, but I persevered and got a usable, albeit poor contrast, copy. (I feared spilling a coffee on the original and becoming unable to play the game which I had legally purchased.)


    In short, users began to revolt and companies eventually began to recognize they were selling fewer copies of their software as people migrated to using non-copyprotected applications.

    Software vendors learned this lesson the hard way many years ago, yet we now have audio (CD) and video (DVD) treading down the same path. I'm waiting to see how long it takes for them to learn this lesson, too.

  13. Re:"backup" audio CDs for "personal" use? by Lumpy · · Score: 4, Informative

    I'll probably be marked as a troll for this but...

    Screw you, asshole.

    I have a plethora of mp3 audio playback devices. My car, home and portable personal devices. These devices have been on the market for over 4 years now and sold with high visibility advertising, so you know for a fact they exist and people are using them. Yes, I rip everything to mp3 so I can listen to it MY WAY, on MY EQUIPMENT, in my home and elsewhere. I place the CD I bought in a locked cd storage cabinet and that's where it sits until it's needed again. Now let's look at something else, what about the phillips CD recorder, compiler. Many more people with these or their computers like to make compiliation cd's. for their own personal use.

    I am sick of your type of self-ritious attitude that marks everyone with an mp3 playback device, a cd burner, and linux or other non MS operating system as the pirates of the Carrabiean or Evil thieves. the cd's I bought ar my property, I can listen to them how I want, and I will...

    and my atitude is the attitude that needs to be taken by everyone that hears someone even try to imply what you said... get in their face.

    --
    Do not look at laser with remaining good eye.
  14. Ability to play in a computer is questionable by Phil+Wherry · · Score: 3, Interesting

    I'm just about to finish up ripping all of my CDs to 160 Kbps MP3 format so I can do casual listening without handling physical media. I'm not too terribly bothered by the loss in quality caused by compression, since I've got the original media to work with for those occasions when I need higher fidelity.

    It occurs to me, though, that the inclusion of a compressed audio player on the CD really doesn't solve the problem, even if it's possible to copy the audio files in some protected way to a hard disk.

    Here's why: my earliest CDs were purchased in early 1986. At that time, my PC was running MS-DOS 3.1. Think for a moment about the odds of a copy-protected program from 1986 working unmodified in a modern computer--let alone the computers we'll have twenty years hence. The inclusion of a copy-protected player program in lieu of a standards-compliant CD looks even more pitiful when one stops to consider the fact that the player program will be basically unuseable in a few years' time.

  15. What about CD recorders and the AHRA? by dpbsmith · · Score: 3, Interesting

    I own a Teac RW-CD22 CD Recorder.

    According to the Audio Home Recording Act of 1992, I'm AUTHORIZED to make single-generation digital copies of CD's onto "Music CD-R" media, a portion of whose price includes a payment into two funds administered by the Library of Congress: two-thirds into a Sound Recordings Fund, with small percentages of this fund earmarked for nonfeatured artists and backup musicians, 40% of the remainder for featured artists, and the rest to record companies; one-third into a Musical Works Fund, to be split 50/50 between songwriters and music publishers.

    My Teac appears to be rapidly turning into worthless junk. UMG's "More Fast and Furious" will not copy on it (it gives the error message "CANT COPY, SCMS ERROR").

    So, the copy protection fails to prevent UNauthorized copies... but succeeds in preventing AUTHORIZED copies.

    Midbar and UMG are cheating those of us who BOUGHT and PAID FOR the right to make copies.

  16. Proper terminology by thumbtack · · Score: 5, Insightful

    The proper term is CORRUPTED, not copy protected.They do not conform to Red Book Standards.

    Congressman Rick Boucher of VA has written a letter to the IFPI and the RIAA suggesting that under the AHRA this may illegal and asking for explanations of the methods used. Under the AHRA there is a 2% surcharge on every CD recorder sold in the US at the wholesale level (See section 1004), that goes to the RIAA, just as there is a 2% surcharge on "Music" designated CDR media.

    In addition Philips refers to these corrupted discs as "silver disks with music on them, but which do not resemble CD's" See this article

    Boycott-riaa and Fat Chucks are maintaining a list of the corrupted CDs. Also, Check out the Home Recording Rights Coalition

  17. Isn't it all just ones and zeros? by HuskyDog · · Score: 3, Interesting
    At the end of the day, a CD is just a great big heap of ones and zeros. In some fancy way, your CD player turns this into sound. Presumably, it does this via a combination of software and nifty electronics (which could be emulated in software). So, therefore, if we could extract all the ones and zeros we could write a program which emulates an audio CD player (on which these crippled discs seem to work fine). We just put an OGG encoder where the D/A converter would be and voila! If a 15 year old CD player can convert the binary data into sound, then so can we.

    So, what is the problem with implementing this scheme (apart from the DMCA). Is it that there is no way of persuading a CDROM drive to output the raw data? If so, this just confirms my view that the entire problem lies in CDROM firmware. Could we re-flash this in some drives?

    Somewhere in a CD player the bits we want are wizzing along a PCB track. Does anyone know the practicality of tapping into this?

    Just my random thoughts on the topic.