Embedded systems protection?

[Karl Sjödahl - dunceor]

On 6/15/07, Henrik Brix Andersen <henrik at brixandersen.dk> wrote:
> On Fri, Jun 15, 2007 at 01:34:49PM +0200, Karl Sjödahl - dunceor wrote:
> >  One way that is popular is to use a OTP flash with a cert inside that
> >  you verify to see if something has changed.
>
> How will that protect from copying? The contents of the flash can
> still be read.
>
> One solution, which I have used earlier, is to have a small bootloader
> in internal flash which then loads, verifies and decrypts the main
> application (which has been encrypted) from external flash. The key
> point here is to make sure the internal flash can not be read out by
> any means.
>
> Regards,
> Brix
> --
> Henrik Brix Andersen <henrik at brixandersen.dk>
>
>

Ah you are all so right, I thought about protection from tampering and
flashing their own software, not secure against copying. Sorry.

br
dunceor