Zfone is simple encrypted voip telephony
Phil Zimmermann, the guy who brought you PGP, has just released a public beta of his new open source encrypted VOIP software – Zfone. The beta is Mac/linux only, the Windows version will be out in a month or so.
It’s an encrypting proxy for SIP calls using pre-existing software. I don’t know enough about how the protocol works to say if this would work with things like Vonage or not.
“In the future, the Zfone protocol 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.”
Zfone has been tested with these VoIP clients and VoIP services:
VoIP clients: X-Lite, Gizmo, and SJphone.
VoIP service providers: Free World Dialup, iptel.org, and SIPphone.
http://www.philzimmermann.com/EN/zfone/index.html
Tags: sureveillance, encryption, voip, sip, phil zimmermann, zfone
