Listen in on encrypted VoIP without decrypting it

Listen in on encrypted VoIP without decrypting it Posted by Cory Doctorow, June 19, 2008 10:34 PM | permalink Researchers at Johns Hopkins have demonstrated an attack against some encrypted Voice-over-IP traffic that uses the size of encrypted packets to make highly accurate guesses at whole words and phrases: That happens because the sampling rate is kept high for long complex sounds like "ow", but cut down for simple consonants like "c". This variable method saves on bandwidth, while