> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
Behalf
> Of alan smith
> Sent: 20 May 2009 15:09
> To: Microcontroller discussion list - Public.
> Subject: [PIC] protected code
> 
> 
> Setting the code protect config bits is supposed to give you a layer
of
> protection, when at least trying to read back from the actual device.
I
> wont get into the discussion about how that can be gotten around.
> 
> My question is...when you generate a hex file with these set, can it
be
> dissassembled..ie..is the code protect only valid for reading back
from
> the device.
> 
> The basis for the question is a client wants to put code updates for a
> product on his website, so anyone can download but doesnt want someone
to
> easily able to reverse engineer it.  I wasnt sure if this protects the
hex
> file.
> 

The code protect bits purely relate to the PIC micro, and prevent useful
code being read out via the programming pins.  They have nothing to do
with the hex file generated by your assembler/compiler.  If you feel you
need to protect the hex file, you will need to encrypt it in some manner
and give legitimate owners the ability to decrypt it through e.g. a
custom programming tool or via a special bootloader pre-programmed into
the product.

Regards

Mike

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