<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt">Hello,<br><br>I have a question that is troubling me and I don't know where to ask it. I posted this question on the asterisk forums but no answer. <br>I have this idea to build a security module based on asterisk and raspberry pi to secure <span style="font-weight: bold;">GSM</span><span> </span><span>calls(not gprs, not 3g etc.)</span> . I know that there is an encryption( A5 ) involved that was cracked and so on and I want to build a stronger one over it, to secure end to end conversations. Basicly I want to build a new module that you can stack over chan_mobile( for bluetooth connection to the mobile phone ) that offers channel encryption. The fantasy would consist of:<br><br>* authentication( certificates maybe, designated keys probably )<br>* encryption<br>* voice signaling for plain channel or secure channel link( voice that
announces the attribute of the link )<br><br>Now I ask you, is this feasible? <br><div><br></div></div></body></html>