http://voipsa.org/blog/2006/06/22/skype-security/ Collective thoughts and musings on the state of VoIP security today. Sun, 12 Oct 2008 07:38:08 +0000 http://wordpress.org/?v=2.6.2 http://voipsa.org/blog/2006/06/22/skype-security/#comment-762 Voice of VOIPSA » Blog Archive » Beyond the Bitpipe Thu, 20 Jul 2006 11:19:32 +0000 http://voipsa.org/blog/2006/06/22/skype-security/#comment-762 [...] I recently installed BT Communicator, which is British Telecom’s answer to Skype.  Like Skype it allows free calls (PC to PC) and offers the capability to break out onto the PSTN to call anyone anywhere, for a fee.  Being naturally curious, I fired up Wireshark and captured some of the activity on the line, and I was delighted to discover that it’s using our old friends SIP and RTP to signal and carry the calls.  In contrast, if you capture Skype traffic, you can’t figure out what’s happening unless you put an awful lot of research into it. [...] [...] I recently installed BT Communicator, which is British Telecom’s answer to Skype.  Like Skype it allows free calls (PC to PC) and offers the capability to break out onto the PSTN to call anyone anywhere, for a fee.  Being naturally curious, I fired up Wireshark and captured some of the activity on the line, and I was delighted to discover that it’s using our old friends SIP and RTP to signal and carry the calls.  In contrast, if you capture Skype traffic, you can’t figure out what’s happening unless you put an awful lot of research into it. [...]

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