PGPfone - Pretty Good Privacy Phone
What is it?
PGPfone (Pretty Good Privacy Phone) is a software package that turns your desktop or notebook computer into a secure telephone. It uses speech compression and strong cryptography protocols to give you the ability to have a real-time secure telephone conversation. Secure voice calls are supported over the Internet, or through a direct modem-to-modem connection, or even over AppleTalk networks.
PGPfone 1.0 is freeware. It is available for both Macintosh (1.0b7) and Windows 95/NT (1.0b2).
PGPfone 2.x is a commercial product, but NAI has shown no interest in it, so it is probably O.K. to use it anyway. If you want to contribute to PGPfone development, please look here.
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