[Full-disclosure] anyone developing a secure telephony application for GSM CSD?

[Fabio Pietrosanti (naif)]

I would like to enter in contact with all the guys here that 
worked/developed on encrypted/secure telephony apps.

Would like to start a community based platform for who worked/is working 
on this kind of technology in order to establish a standardization and 
interoperability path.

No, i am not talking about VoIP clients but encrypted voice clients that 
leverage "legacy" telephony networks (GSM, SATCOM, PSTN, ISDN, etc).

Fabio/naif