Nautilus Secure Phone

One of the first secure telephony programs. Not limited to VOIP but can also directly encrypt a telephone line by using modems. Calls are encrypted using Diffie-Hellmann key exchange and several symmetric ciphers.Download Latest Version : nautilus-1.8rc1.linux.zip (17.2 kB)
Or Find Other Files http://sourceforge.net/projects/nautilus.berlios/files/
Or read more in here : http://developer.berlios.de/projects/nautilus/