Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!henry
From: henry@utzoo.UUCP (Henry Spencer)
Newsgroups: net.micro
Subject: Re: Copy Detection Protection
Message-ID: <6969@utzoo.UUCP>
Date: Mon, 21-Jul-86 15:36:37 EDT
Article-I.D.: utzoo.6969
Posted: Mon Jul 21 15:36:37 1986
Date-Received: Mon, 21-Jul-86 15:36:37 EDT
References: <2366@brl-smoke.ARPA>, <449@sunybcs.UUCP>
Organization: U of Toronto Zoology
Lines: 15

> Putting the serial number on a diskette is useless.  It wouldnt even
> matter if it was encrypted, because all somebody has to do is get a hold
> of 2 copies of the program, and compare the two files.  Where they differ,
> that is where the serial number lies, and that is where you can change
> it to whatever you wish.

I think the intent of the original suggestion was to protect against
casual copying, not determined and systematic piracy.

If you feel mean, put a whole bunch of different stuff on each diskette,
and bury the serial number *and a checksum* somewhere in the middle.
-- 
EDEC:  Stupidly non-standard
brain-damaged incompatible	Henry Spencer @ U of Toronto Zoology
proprietary protocol used.	{allegra,ihnp4,decvax,pyramid}!utzoo!henry