This looks like a boot into the US goverments plans to monitor all calls.
http://www.slyck.com/forums/viewtopic.php?t=20620Philip Zimmerman, creator of the popular Pretty Good Privacy e-mail encryption scheme, has come up with a application that aims to provide a similar level of protection for VoIP phone calls. Called Zfone and available as a beta for Mac OS X and Linux only (a Windows version is in the works for April), the application handles encryption and decryption of VoIP calls without the need for a central server for authentication or storing keys.
Zfone works with the major VoIP protocols and appears simple to use. Both parties of a call need to have the application installed in order for the encryption to function; if only one party is running the application, the call will be handled like regular, unencrypted VoIP traffic. If Zfone is running on both ends of a call, however, a key will be generated with each call and every packet encrypted and decrypted in real-time. A simple-looking GUI indicates whether or not the call is secure.
Zimmerman has submitted the ZRTP protocol which sets up the cryptographic key agreement to the Internet Engineering Task Force for ratification as a standard. In addition, Zimmerman has created a Zfone software development kit so that developers can integrate ZRTP functionality into both softphones and VoIP hardware.
Lets see if they turn nasty
