What can be logged?

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Lukas Kuzmiak lukash at backstep.net
Tue Mar 6 22:05:47 UTC 2012


one more thing that crossed my mind - it really depends on what you call a
"silent sms", it may also be SMS sent to update some parameters of a SIM
card (like (F)PLMN list), that is still a silent sms - most phones will not
show anything about this being received .. and that will reach the SIM
obviously.

however i have no knowledge what authorities/hackers actually use as a
silent SMS.

2012/3/6 Harald Welte <laforge at gnumonks.org>

> On Tue, Mar 06, 2012 at 09:06:22PM +0100, Florian Borggräfe wrote:
>
> > i have a question about the functionality of the Osmoscon SimTrace
> > hardware system.
> > Can I log everything, also packets like silent SMS
> > (https://en.wikipedia.org/wiki/SMS#Silent_SMS)?
>
> I can only follow up to what Lukas wrote.  We can trace anything that
> ever hits the ME - SIM interface.  But which phones might or might not
> forward silent messages to the SIM remains an open question.
>
> My personal educated guess would be that it is probably not sent to the
> sim in the majority of the cases/phones.  SMS on the SIM is an ancient
> relic, and then in the case of silent SMS, if the phone knows it shall
> discard it, why first push it to the SIM...
>
> Regards,
>        Harald
>
> --
> - Harald Welte <laforge at gnumonks.org>
> http://laforge.gnumonks.org/
>
> ============================================================================
> "Privacy in residential applications is a desirable marketing option."
>                                                  (ETSI EN 300 175-7 Ch. A6)
>
>
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