Zfone Secure VoIP phone software.
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Zfone Description

Secure VoIP phone software. Zfone is my new secure VoIP phone software, which lets you make secure phone calls over the Internet. It encrypts your call so that only the other person can hear you speak. Zfone lets you whisper in someone's ear, even if their ear is a thousand miles away.In the future, the ZRTP protocol used by Zfone will be integrated into standalone secure VoIP clients, but today we have a software product that lets you turn your existing VoIP client into a secure phone. The current Zfone software runs in the Internet Protocol stack on any Windows XP, Mac OS X, or Linux PC, and intercepts and filters all the VoIP packets as they go in and out of the machine, and secures the call on the fly. You can use a variety of different software VoIP clients to make a VoIP call. The Zfone software detects when the call starts, and initiates a cryptographic key agreement between the two parties, and then proceeds to encrypt and decrypt the voice packets on the fly. It has its own little separate GUI, telling the user if the call is secure. It's as if Zfone were a "bump on the cord", sitting between the VoIP client and the Internet. Think of it as a software bump-on-the-cord. Maybe a bump in the protocol stack.Zfone has been tested with these VoIP clients: X-Lite, Gizmo, and SJphone. And these VoIP service providers: Free World Dialup, iptel.org, and SIPphone.A good way to test your VoIP client is to make a call to a server that simply echoes your voice back to you, just so you can see if it works at all. A good example of an echo server is the one offered by Free World Dialup. To call that, enter this SIP URI in the "Call" text box: 613@fwd.pulver.com, then press the call button.In order to make your VoIP client work with Zfone, you will have to open your VoIP client's preference panel and change the SIP port number to 5060. Requirements: · VoIP client software. What's New in This Release: · Changes in libzrtp sources tree; · Improvements in libzrtp initialization routine; · Improvements in support for passive mode; · Improvements in ZRTP feedback interface and system-dependent functions; · ZRTP configuration approach was improved; · Implemented new functions in protocol according to the Internet Draft v 10. and other changes, the details of which may be found in libzrtp.

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