According to the site “reseau et telecom” , Peter Cox have released a POC of VOIP sniffing. The techrepublic say that Mr Cox was inspired by Phil Zimmermann. However, since I wasn’t able to find the software I am not sure what is new under the sun with it. VOIP is known to be insecure since the beginning. For instance the tool Vomit (voice over misconfigured internet telephones was released in 2004. A nice framework in python was also presented in a conference this year. Sending data in clear is also not a specific problem to VOIP, POP3 email or MSN message are also send in clear. Maybe It is still not obvious because decoding VOIP stream requiers more knowlegde than plain text protocol.
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