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CD/DVD Protections
Index
  • CD-Cops
  • DVD-Cops
  • CD/DVD Protections Overview
  • CD-Cops
    Company : Link Data Security
    Protection : CD-Cops
    How to Detect : When executing the main executable a window appears with the words CD and Cops in the title.

    The following files exist in the installation directory:

    • CDCOPS.DLL
    • Files with the .GZ_ and .W_X extentions.

    Use Protection ID or ClonyXXL

    Backup Solution : In most cases the CD-Cops Decrypter will do the job.
    Protected : Interactive English / De Agostini [Italian]
    Nationalencyklopedin [Swedish]
    Agostini Atlas 99 [Italian]
    Agostini Basetera [Italian]
    BMM [German]
    DK Kort [Danish]
    Lademanns'99 [Danish]

    [More CD-Cops Protected Games]

    Protection Info
    CD-Cops is a envelope protection which is added to the CDís main executable. Minute differences are measured to establish the CD-ROMís fingerprint and to ensure that copies are not accepted. This fingerprint is usually expressed as an 8-digit code or key number.
    The CD-Cops software which recognizes and either accepts or rejects the CD is protected by Linkís Code Security, a system which has been in use since 1984 and is known throughout the world as being virtually unbreakable. Linkís Code Security is a legend in the Middle East where piracy is a serious problem.
    Additional Info

    PPeter - The Hungarian Guru of CD's:
    The CD-Cops protection system is not using electronic "fingerprint" code. The check routine only verifies the physical angle between the first and last accessible logical block on the CD. This verification is very good to identify the an original disc. The 8-digit code holds the angle information and the check routine compares this with the CD.
    CD-Cops is a very good protection system, because the software developers don't need special mastering machine, they only have to add their verifying code to the main application. The angle between the first and last logical block is different for every disc written by CD-R writer, due to the Laser Calibration Area, different CD-R types, etc.

    mcLallo:
    Commercial ready-made copy protections are always interesting. Here is another one, used to protect CD-ROMs. It's a nice one, timers making sure the program will crash if something takes more time than it should (as if someone would put a breakpoint somewhere and fool around), a couple of checksums to make sure no one's been changing anything in the code, and - of course - some self-modifying code decrypting itself just when it needs to be used. It even claims to be able to separate perfect CD copies from the original CD!

    Articles/Information



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