[Gsmmap] A5/1 - A5/3

Alexandru GHERMAN alex.gherman at gmail.com
Tue Jan 7 17:54:26 CET 2014


Hi Luca,

Thank you very much. I would like to take a look at the source and try to
adapt it. For now I only have a Nexus 4(LG) to run it on or some Sony.

Is it a specific dependency for the Baseband modem to be of a certain type
that only the Samsung supports the trace?

Alex
On 7 Jan 2014 16:00, "Luca Melette" <luca at srlabs.de> wrote:

>
> Hi Alex,
>
> > How is it possible to see which encryption algorithm is in use?
> > Is there any AT+ SIM command or any command that can be issued to the
> > SIM to return the setting?
>
> In my experience, this is very hard to get, since it's not decided
> by the mobile or modem you have on your hands.
>
> These user devices support a set of algorithms (A5/0 to A5/3), but the
> actual one used over the air is decided by the network each time
> you establish a channel. And sometimes the encryption is not even used.
>
> I doubt AT commands are extended to that point, but some diagnostic
> protocols offer this information.
>
> The easier source are radio logs/modem debug information, that we are
> asking all of you to submit to gsmmap.org so that we can create a
> more advanced map, covering also 3G and GPRS.
>
> Whenever you have an xgoldmon compatible mobile, you can get those
> files and possibly extract the radio signalling with Tobias' tool:
> https://github.com/2b-as/xgoldmon
>
> Cheers,
>
> LM
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