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I know that in ZRTP, the negotiation of the cryptographic keys takes place entirely in the RTP stream. However, I do not understand:<BR>
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1. How can this be proven when having setup FreeSWITCH and having deployed ZRTP, and having two softphones (such as X-LITE) connected in a test environment. Can a tool cush as Wireshark or any other be used in this case?<BR>
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2. What are other protection mechanisms provided to prevent third-parties from masquerading as one of the end-points?<BR>
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Thank you!<BR>
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Serge.<BR><BR><BR>
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