[OSM-dev] TomTom map format
flo at rfc822.org
Tue Dec 30 22:38:12 GMT 2008
On Tue, Dec 30, 2008 at 09:48:04PM +0100, Stefan de Konink wrote:
> Subject: Re: [OSM-dev] TomTom map format
> Matthias Rötsch wrote:
> > is there already someone how is analysing the TomTom map format or are
> > there small bits of knowledge about it?
> > I want to give it a try, even if it leads to nothing. But I just have
> > few experience with file format reverse engineering.
> We have looked at the postcode format that revealed a bit of the used
> strings. If you really want to work on decryption I suggest taking qemu
> and trying out to run the arm binary of a 'specific' embedded release.
> It is quite obvious that you must be able to run it in the qemu debugger...
> > At a first look it seems quiet structured, not compressed and at least
> > not entirely encrypted.
> I have the same observation; I wouldn't be surprised if they first
> define the scope of the structures in the file format to be compatible
> between every release that is using that interpreter; and then bit
> efficient encode it.
I'd be interested in bit hacking too - Have the findings been documented
somewhere? Would a seperate list make sense?
Florian Lohoff flo at rfc822.org +49-171-2280134
Those who would give up a little freedom to get a little
security shall soon have neither - Benjamin Franklin
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