[ Thanks to finid
for this link. ]
“Jitsi (Romanian for Wires) is a multi-protocol and
multi-platform voice and video instant messenger client. It is
mostly implemented in Java, and is Free/Open Source software. Its
multi-protocol features are similar to that of Kopete, the native
IM client for the K Desktop Environment. In a previous incarnation,
Jitsi was known as SIP Communicator.“Where other VoIP services and clients send data in the clear,
Jitsi sets itself apart by making use of ZRTP to set up secure
communication with SRTP, Secure Real-time Transport Protocol. Other
clients use plain Real-time Transport Protocol, RTP. By itself,
ZRTP is not the security protocol, but the mechanism used to
generate and exchange keys between both ends of the VoIP session.
“