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How do you prevent CD copying ?

Discussion in 'Electronic Repair' started by moonlite, Jun 20, 2007.

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  1. moonlite

    moonlite Guest

    A friend of mine wants me to provide him with very important technical
    information on a CD. I have a feeling he wants to use it for
    commercial purposes. Without getting copy rights, is there a way to
    prevent him from copying the CD for other purposes ? Specifically, can
    I do something to the CD itself to make copying impossible, or put
    some kind of time limits on it so that it will become useless after a
    certain period of time passes ? Thank you for your help with this
  2. Eeyore

    Eeyore Guest

    What's going to be on the CD ? Ordinary computer files ? You'll be hard-pressed
    to do anything to protect those.

    This person is a 'friend' yet you don't trust him ?

  3. If it can be read it can be copied. If text, no matter what you do to it
    you could always just take a screen snapshot.

    It's the same with music CDs - you may make it difficult to make a clone
    or digital copy but you can still do it via analogue.
  4. James Beck

    James Beck Guest

    You do know that, if the work is his, a copyright existed from the
    moment it came into being, at least in the US that's how it works. It
    is just easier to defend if you have registered your copyright. That
    being said, I know what one company does is to provide a password
    protected ZIP file, and each copy has a different password. If they
    find an unauthorized copy out there at least they can trace it back to
    the original owner. If the info is that sensitive, you might check into
    a quick and dirty trade secret agreement.

  5. This is not a repair issue, so why in the world are you posting this

    Your's is at least the second post today that is off-topic.

  6. moonlite

    moonlite Guest

    As you can see, several people answered my post without any
    objections. You are in the minority my friend. The title of the post
    pretty much describes what the post is about. In the future, if you
    don't like a post just skip it and go to the next one. Do not act as a
    Google cop.
  7. Guest

    Give it to him in .pdf format as an e-mail enclosure. At least he
    cannot then alter the file.


    If you give it to him on paper, he can scan it.
    If you give it to him as a standard Word/Excel/equivalent file, he can
    alter it and then re-use it freely.
    _ANY_ CD may be duplicated with sufficiently sophisticated software,
    or via analog playback.

    So, forget giving it to him on as any sort of electronic file that
    cannot be duplicated. The best you can hope for is to make it
    difficult to change (.pdf or similar). NOT impossible, simply

    Peter Wieck
    Wyncote, PA
  8. John Keiser

    John Keiser Guest

    FYI .pdf is easily scanned.
    I think this ends up as a trust issue.
  9. James Sweet

    James Sweet Guest

    No, not really. A few CD copy protection schemes have been devised, but they
    usually cause more problems than they solve, and all of them can be cracked.
    The only way to prevent something from being copied is to not allow anyone
    else to have it in the first place.
  10. Meat Plow

    Meat Plow Guest

    The OP could pack the files into a self extracting RAR file or series of
    files protected with a password then record that to disc. Those intended
    to use the data could then extract it on their end.
  11. Bob F

    Bob F Guest

    For your information, this is usenet, not google. And without usenet
    "cops", groups like this quickly become useless. There are probably
    hundreds of groups for which your post would be appropriate. Find one
    and use it.

    Be a good usenet citizen - not a problem.

  12. Aside from compressed file password protection is no real protection at all,
    the OP said he didn't want his *destination* to duplicate the CD.

    That is, he wants to pass over information for limited use, then throw it
    away when they're done.

    This requires trust on the side of the destination. And he clearly doesn't
    have that.
  13. JW

    JW Guest


    This is NOT Google. This is UseNet. In fact, many UseNetter's wish that
    Google would stop allowing people to post to UseNet through their
  14. Meat Plow

    Meat Plow Guest

    Well if it's password protected then the data is unusable and copying then
    becomes a non-issue. And when does a password offer no protection at all?
    Explain that one to me.
    Yeh I realize that and it really isn't an issue as long as those who are
    privy to the data have the proper password
  15. Meat Plow

    Meat Plow Guest

    Oh hell yes! You wouldn't believe the spam that google churns out daily.
  16. Well I feel that this is a totally relevant question for this group... What
    if you have some sensitive material that is electronics related and you
    don't want your info all over the web.
  17. Bob F

    Bob F Guest

    Point taken.

  18. James Sweet

    James Sweet Guest

    Well for the intended user to access the data, they have to know the
    password as well, at which point they can simply remove the password or give
    it to anyone they give a copy to. For what the OP requested, a password
    offers no protection.
  19. Jamie

    Jamie Guest

    what what you may to the CD, it does not matter because he can
    simply move the data else where via normal routines.

    WHat you could do how ever, is have a special app for lets
    say viewing the contents which has been incrpyted and only the
    viewer can show and thus also test for it from a CD>
    Place a physical error on the CD and have the reader look for it:)
  20. me

    me Guest

    Or write the data, then take it to a parking lot, place written side down
    on ground, place foot on top and slide it all around.
    Now it can't be copied.
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