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Article #437

Re: Copy protection schemes

#437
From: Oz
Date: Tue, 29 Sep 1998 00:00
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In article <6urf11$1j1$1@news3.cableinet.co.uk>, John
<jps@peachworld.com> writes

>Also does anyone know of any better ways to add copy protection to a program
>which can be easily implemented in TP7? I realise that no copy protection
>technique is perfect.

I thought up one once, but never implemented it.

The idea was to scratch (or dissolve) off a small patch of the mangetic
surface of a floppy and format it. One can then locate the areas that
have no surface and code that into each individual program. Each disk
would be different of course. Then a write to those tracks and sectors
followed by a read will always give a zero (or one, or whatever) for
that disk, but not for a copy. I would imagine it would be hard to
duplicate such damage exactly and it only requires some concealment of
the r/w code and that ought to put most people off.

Anyhow, one can dream.

-- 
Oz
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From: Oz <Oz@upthorpe.demon.co.uk>
Subject: Re: Copy protection schemes
Date: 1998/09/29
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