9 Jan
2013
9 Jan
'13
9:10 p.m.
Hi, * Dario Lombardo dario.lombardo.ml@gmail.com [2013-01-09 20:41]:
As described in Nico Golde's talk at 29c3, mobile operators can deactivate encryption on MT SMSes.
I think this is a misunderstanding, please check the slides/video.
To check if a MT is encrypted I've started 'mobile' with GSMTAP, and I've sent an sms to the mobile. Encryption seems to be requested by the network. Now the question is: how can I be sure that encryption is always activated?
If the network is not encrypting, you don't get a CIPHER MODE COMMAND message. For MT you would have to generate events that cause this, like sending an SMS. For MO you can simply to a service request.
Cheers Nico