Path: utzoo!attcan!uunet!ns-mx!mel.cipl.uiowa.edu!wolf
From: wolf@mel.cipl.uiowa.edu
Newsgroups: comp.sys.mac.programmer
Subject: How are some copy protections setup?
Message-ID: <1990Sep13.111657.1@mel.cipl.uiowa.edu>
Date: 13 Sep 90 17:16:57 GMT
Sender: news@ns-mx.uiowa.edu
Lines: 15

I know many will or cannot post code for protection schemes (as it would most
likely defeat the purpose).

I was wondering how large programs are copy protected, I would like to know
about two ways....The first is ones which can tell that they have been copied
and won't run, and second, ones which cannot be copied (as the data can't be
read from disk).

I don't mean simple things like setting the locked bit or anything like that,
but real ways...

Code most appreciated, descriptions or psuedo-code would be dandy also.

Thanks!
M Wolf