Even speech can be reconstructed by packet length and timing. A paper from 6 years ago "Phonotactic Reconstruction of Encrypted VoIP Conversations": http://www

Even speech can be reconstructed by packet length and timing. A paper from 6 years ago "Phonotactic Reconstruction of Encrypted VoIP Conversations": http://www.cs.unc.edu/~fabian/papers/foniks-oak11.pdf http://www.cs.unc.edu/~fabian/papers/foniks-oak11.pdf edit: this paper is referenced in fact by the paper submitted here.