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Nico Golde osmocom at ngolde.deHi, * Dario Lombardo <dario.lombardo.ml at 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