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From: joels@tektronix.UUCP
Newsgroups: net.micro.cbm
Subject: Re: protecting the software (dongles?)
Message-ID: <2480@tektronix.UUCP>
Date: Fri, 4-May-84 22:07:07 EDT
Article-I.D.: tektroni.2480
Posted: Fri May  4 22:07:07 1984
Date-Received: Tue, 8-May-84 03:32:21 EDT
References: <2468@tektronix.UUCP>
Organization: Tektronix, Beaverton OR
Lines: 9


    Fixed resistors is not a good dongle scheme. All you have to do to break
it is to use an ohmmeter to read the value and then make a fake dongle. You 
need some kind of logic so that the dongle responds properly only when the
correct signal is sent from the computer. The more complicated this logic is
the harder the dongle is to decipher.

Joel Swank
Tektronix, Beaverton OR