Secure Sofware Key

From: Yannick Gingras (ygingrasat_private)
Date: Thu Aug 29 2002 - 14:46:27 PDT

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    Hi, 
       I am wondering if there are any techniques to make a CD-Key of the like 
    unbreakable.  Either by giving it a cancelation date and a periodic renewal 
    from a server or just by using self md5 signature on the resulting 
    executable.  I know it must not be easy because the whole software piracy 
    problem would be resolved but there must be some way to make it really hard 
    to break it.  Anyone have hints on this issue ?
    
    Thanks
    
    - -- 
    Yannick Gingras
    Network Programer
    ESC:wq
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