Re: [Linphone-developers] TLS Network Option

[Simon Morlat]

Hi Ahmed,

To clarify, SIP/TLS is really SIP over TLS, that is there is a TCP/TLS connection made on the SIP server, then after the SSL handshake SIP messages are totally encrypted both ways. No SIP messages are exchanged before the SSL handshake.
The media streams (which are RTP packets over UDP), are established in different channels and are not encrypted by default.
In order to encrypt them too, you need to activate SRTP encryption in the settings. SRTp is an encryption protocol dedicated to RTP streams, where only the contents of the packet is encrypted (that is voice data), not the header (header contains sequence number, payload type number, timestamp).

Best regards,

Simon

Le 29/01/2012 15:06, Ahmed Refaey a écrit :

I need a confirmation on choosing TLS option, Do the early first packages used for handshaking are sent using UDP before switching to TLS? 

--

Ahmed El-Refaey

Senior Software Engineer

R&D Team

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