Newsgroups: comp.sys.ibm.pc
Path: utzoo!utgpu!utstat!anthony
From: anthony@utstat.uucp (Anthony Ayiomamitis)
Message-ID: <1989Jun25.044714.3001@utstat.uucp>
Organization: Statistics, U. of Toronto
Date: Sun, 25 Jun 89 04:47:14 GMT

Subject: Software protection using Quick Basic V4.5
Distribution: utstat

    I am developing a program using Microsoft's QuickBasic (Version 4.5)
which I hope to market in the near future. In order to help reduce the
number of unauthorized copies made, I would like to develop some internal
copy protection using QBasic. I would be very interested in hearing any
suggestions people may have regarding this task. Also, how can I detect
a "copy" of my original diskette?

    There are instructions in QBasic that allow one to read and write
binary files (GET and PUT) and I would think that these instructions could
be used in some creative fashion to detect a copy.

    Many thanks in advance.   Anthony.
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