Path: utzoo!attcan!uunet!aplcen!uakari.primate.wisc.edu!crdgw1!rpi!coxs
From: coxs@itsgw.rpi.edu (Sean Cox)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Info wanted: Copy protection
Message-ID: <_JH%R^|@rpi.edu>
Date: 20 Sep 90 16:30:48 GMT
References: <9009201441.AA13387@thep.lu.se>
Organization: Rensselaer Polytechnic Institute, Troy NY
Lines: 23

magnus@THEP.LU.SE (Magnus Olsson) writes:

>Copy-protected programs for the IBM PC seem to be more or less extinct - 
>fortunately! Copy-protection still is an interesting subject, since the
>programs involved must be rather nice hacks [or perhaps nice isn't the
>msot appropriate word to use :-)].

>So, I wonder if anyone out there has any information about how the
>various copy-protection schemes work. 

      The most popular scheme I've seen lately is the "No on-disk copy-
 protection" scheme in a lot of games. When you start up the game, it asks
 for some peice of info from the manual or something that accompanied the
 original disk, usually these bits of wisdom are printed in such a way to
 make them difficult to photocopy.

                                              -Sean

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