[sudo-discuss] robot hacking - help crack the code!

[Patrik D'haeseleer]

On Tue, Sep 23, 2014 at 11:43 AM, Jake <jake at spaz.org> wrote:

>
> disk: \x02\x13\x00LST0001123.JBI     \x00\xfc
> disk: \x02\x13\x00LST0001124.JBI     \xff\xfb
>
> yasnac: \x02\x0f\x00FRD123.JBI     \xdc\xfc
> yasnac: \x02\x0f\x00FRD124.JBI     \xdb\xfc
>


> perhaps it's a 16-bit checksum?
>

Yeah, looks like some sort of 16-bit checksum, with the first hex code
being the lowest byte. If you read them this way, you see they're exactly 1
bit different:

\x00\xfc -> #FC00
\xff\xfb -> #FBFF

\xdc\xfc -> #FCDC
\xdb\xfc -> #FCDB

I'd say try again with 113 or 133 in the filename, instead of 123 - need a
bit more evidence.

Patrik
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