"Hackers large exposure: VoIP security secrets and solution" content abstract: using the phone number of the phone, hacking the conversations of others, add some background noise when others speak, malicious forced to hang up when others speak... All this is the dream of a lot of "hackers", however, in previous communications networks, based on some technical reasons, these are difficult to achieve, with the application and popularization of VoIP technology, hackers have finally wait for opportunity, in the era of VoIP, especially the end-to-end VoIP application era, in some lax safety protection network, hackers have these dreams can come true,
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