> Look at rainbow Systems, Flex LM, and a number of other similar companies
> that provide both USB and Printer Port dongles.

Oh, and I forgot to mention that several times crackers can eliminate
dongles by writing a device driver that acts as the dongle, so the software
things that the dongle is attached.

The equation for security and protection is always the same. The first
lesson should learn is that there is no 100% protection - you can talk about
your home security system, a bank, an encryption algorithm or your USB
dongle, it is always remain true. The only thing you can do is to increase
the effort someone has to put on to break it. So if you think that your
invention worth 100million U$ then it will be most probably broken -
assuming others think the same and they could not produce it by themselves.
In that case the best protection is to protecting it by law - patenting it
for example - in my opinion.

Tamas



On Thu, Jun 26, 2008 at 9:19 AM, Alan B. Pearce <A.B.Pearce@rl.ac.uk> wrote:

> >Has this been done before? (Try not to throw plates at me if it has)
>
> This is what practically every dongle in existence does. They have been
> around for years, the early ones not as complex as what you are suggesting,
> but as time went on they have got more complex to a point where they do
> what
> you are suggesting.
>
> Look at rainbow Systems, Flex LM, and a number of other similar companies
> that provide both USB and Printer Port dongles.
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>



-- 
Rudonix DoubleSaver
http://www.rudonix.com
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist