Last Updated on: 30th November 2023, 09:06 pm

Web site: zfoneproject.com
Category: Network
Subcategory: VoIP Clients
Platform: Linux, OS X, Windows
License: Proprietary
Interface: GUI
First release: 2006

Zfone – a secure VoIP phone software product which lets you make encrypted phone calls over the Internet. Its principal designer is Phil Zimmermann, the creator of PGP, the most widely used email encryption software in the world. Zfone uses a new protocol called ZRTP, which has a better architecture than the other approaches to secure VoIP.

– Doesn’t depend on signaling protocols, PKI, or any servers at all. Key negotiations are purely peer-to-peer through the media stream
– Interoperates with any SIP/RTP phone, auto-detects if encryption is supported by other endpoint
– Available as a “plugin” for existing soft VoIP clients, effectively converting them into secure phones
– Available as an SDK for developers to integrate into their VoIP applications
– IETF has published the protocol spec as RFC 6189, and source code is published

Zfone runs on Windows XP and Vista, both 32-bit and 64-bit versions. Zfone will encrypt audio and video for Apple iChat calls on Mac OS X. Zfone has been tested with these VoIP clients: X-Lite, Gizmo (audio, no video yet), XMeeting, Google Talk VoIP client, Yahoo Messenger’s VoIP client (for audio), Magic Jack, and SJphone. It does not work with Skype.

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