Many VoIP clients include some form of built-in text chat or instant messaging. Does Zfone or ZRTP encrypt those text messages?
No. Not yet, anyway. ZRTP does very well by limiting its mission to just managing the keys and encrypting RTP media streams for VoIP. Also, these instant text messaging protocols come in a number of different variants, such as AIM or Jabber, with different VoIP clients supporting different instant messaging protocols. Each of them will require a different method of encryption, and that remains to be worked out. Some methods already exist for encrypting some forms of text chatting, such as the one offered by PGP Corp. We’re looking at the most appropriate methods to add this capability to Zfone.
