Zfone is software for secure voice communication over the Internet (VoIP), using the ZRTP protocol. It is created by Phil Zimmermann, the creator of the PGP encryption software. Zfone works on top of existing SIP- and RTP-programs, but should work with any SIP- and RTP-compliant VoIP-program.
Zfone turns many existing VoIP clients into secure phones. It runs in the Internet Protocol stack on any Windows XP, Mac OS X, or Linux PC, and intercepts and filters all the VoIP packets as they go in and out of the machine, and secures the call on the fly. A variety of different software VoIP clients can be used to make a VoIP call. The Zfone software detects when the call starts, and initiates a cryptographic key agreement between the two parties, and then proceeds to encrypt and decrypt the voice packets on the fly. It has its own separate GUI, telling the user if the call is secure. Zfone describes itself to end-users as a "bump on the wire" between the VoIP client and the Internet, which acts upon the protocol stack.
[Intro:]
Uh yeah, Forgive me lord
Uh, Cmon, Yeah, Uh
Listen to me
[Verse:]
This is the prayer of a hard weight heavy
I'm in a sea of depression, Please lord, Let my ship stay steady
Cause I ain't ready, To be devoured by the mouth of death
My cup of faith runs full, Now half-ounce's left
So I count my breaths and hold my own
Hopin satan ain't stole my throne
I know, All too well, What it's like to be young and poor
When everyday is as dark as the one before
And I just wanna be like you
Step out onto the surface of this water lord, And then run to shore
Would you meet me at the bank of the sea?
For a hug, Be as anxious as me?
I gotta know, Cause everyday is a fight to win
When you're surrounded by triflin men
Sometimes I feel I'm worth nothin more than just my mic and pen
I need you in my life again