<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:10pt"><div><span style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; ">> On Thu, 2012-10-25 at 12:14 -0700, sab sab wrote:</span><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; "><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; ">>> Hello,<br>>> <br>>> I have a question that is troubling me and I don't know where to ask<br>>> 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<br>>> raspberry pi to secure GSM calls(not gprs, not 3g etc.) . I know that<br>>> there is an encryption( A5 ) involved that was cracked and so on and I<br>>> want to build a stronger one over it, to secure end to end<br>>>
conversations. Basicly I want to build a new module that you can stack<br>>> over chan_mobile( for bluetooth connection to the mobile phone ) that<br>>> 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<br>>> announces the attribute of the link )<br>>> <br>>> Now I ask you, is this feasible? <br>>> <br>><br>>With asterisk anything (*) is possible.<br>><br>>Problem however is the other end, the GSM-handset.<br>>Only option at the moment afaics, is with smart-phones.<br>>There you can install soft-phone-clients, that can do encryption.<br>>Point however is, that con can only make secure call doing data-calls.<br>><br>>"Linphone is now available as an Android application.<br>>This
application is available through the Google Market for all people<br>>having an Android phone. It is possible to use linphone on android to<br>>make VoIP calls using wifi or 3G (make sure it is allowed by your<br>>operator before)."<br>><br>>f<span style="font-size: 12pt; ">or example: http://www.linphone.org/eng/linphone/news/android.html</span></div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;" class="yui_3_7_2_18_1351231015253_58">>This is the first release of linphone on android, and we wish to<br>>continue the development in the coming year to bring many improvements,<br>>i<span style="font-size: 12pt; ">ncluding:</span></div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;" class="yui_3_7_2_18_1351231015253_58">><span style="font-size: 12pt; "> * run as a service to allow to receive calls all the time (not</span></div><div
style="font-family: times new roman, new york, times, serif; font-size: 12pt;" class="yui_3_7_2_18_1351231015253_58"><span style="font-size: 12pt; ">></span><span style="font-size: 12pt; "> just when the application is showed)</span></div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;" class="yui_3_7_2_18_1351231015253_58">> * video support<br>> * optimize battery savings<br>><br>>Mobile phones interfaces<br>><span style="font-size: 12pt; "> * Android application (with video support)</span></div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;" class="yui_3_7_2_18_1351231015253_58">> * iPhone/iPad application (with video support)<br>> * Blackberry application (no video support yet)<br>><br>>There might be other softphones doing the same
trick.<br>><br>>hw</div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;" class="yui_3_7_2_18_1351231015253_58"><br><span style="font-family: arial, helvetica, sans-serif; font-size: 13px; ">Thank you for your reply, but I don't want to use a smart phone to do this or the data connection of the phone. Basically this is were I want to get:</span></div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;" class="yui_3_7_2_18_1351231015253_58"><br></div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;" class="yui_3_7_2_18_1351231015253_58">wifi network ->wifi adapter raspberry pi -> asterisk raspberry pi ("routing")-> ENCRYPTION(personal flavour) ->(chan_mobile)bluetooth adapter raspberry pi->phone with bluetooth ->voice connection</div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"
class="yui_3_7_2_18_1351231015253_58"><br></div><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;" class="yui_3_7_2_18_1351231015253_58">Can this be done?<br><br><br> </div> </div> </div></body></html>