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Hi Jason,<BR>
<BR>
Thank you so much for your suggestions. You adviced to do the measurement in whatever way I normally would, comparing ZRTP sessions with sessions that do not involve ZRTP, and seeing if there are performance differences that affect my usage scenario.<BR>
<BR>
In other world, comparing the situation where I have zfone to secure end points and the situation where I have no zfone. I still want to know the tools (security tools or network tools or any others) to use and how to come up with performance differences.<BR>
<BR>
Thank you!<BR>
<BR>
Serge.<BR> <BR>
<BR>> Date: Thu, 1 Apr 2010 18:09:15 +1100<BR>> From: jason@jasonjgw.net<BR>> To: freeswitch-users@lists.freeswitch.org<BR>> Subject: Re: [Freeswitch-users] ZRTP protocol measurement<BR>> <BR>> SERGE TUMBA <serget68@msn.com> wrote:<BR>> > <BR>> > I would like to know how to measure the performence of the zrtp using<BR>> > FreeSWITCH that connect two X-Lite softphones which use the zfone for<BR>> > encrypting voice packets on both end phones.<BR>> <BR>> What do you want to know? There are almost as many performance measurements as<BR>> there are people doing the measuring. I would suggest measuring in whatever<BR>> way you normally would, comparing ZRTP sessions with sessions that do not<BR>> involve ZRTP, and seeing if there are performance differences that affect your<BR>> usage scenario.<BR>> > <BR>> > Also, can someone contrast and compare ZRTP to SRTP focusing on these two<BR>> > protocol behaviors.<BR>> <BR>> Have a look at http://www.zfone.com/ for a description of ZRTP. From an<BR>> operational perspective, the main difference is that in configuring SRTP, you<BR>> need to use TLS to secure the SIP signaling; otherwise, the cryptographic keys<BR>> are transmitted in the clear, which completely eliminates the security.<BR>> Setting up TLS securely requires a public-key infrastructure whereby each side<BR>> verifies the identity of the other.<BR>> <BR>> In ZRTP, the negotiation takes place entirely in the RTP stream; there are<BR>> several protection mechanisms provided to prevent third-parties from<BR>> masquerading as one of the end-points (namely, key finger-prints, displayed to<BR>> the user as words that can be verified in the conversation, and<BR>> the use of mathematically related keys in subsequent sessions between the same<BR>> parties, but without diminishing security). No public-key infrastructure is<BR>> needed, hence no X.509 certificates or TLS are required.<BR>> <BR>> <BR>> _______________________________________________<BR>> FreeSWITCH-users mailing list<BR>> FreeSWITCH-users@lists.freeswitch.org<BR>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users<BR>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users<BR>> http://www.freeswitch.org<BR> <br /><hr />The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. <a href='http://www.windowslive.com/campaign/thenewbusy?tile=multicalendar&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_5' target='_new'>Get busy.</a></body>
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