Or, the inherent backdoor in poorly encrypted VOIP without proper packet padding: http://cs.unc.edu/~fabian/papers/tissec2010.pdf http://cs.unc.edu/~fabian/pape

Or, the inherent backdoor in poorly encrypted VOIP without proper packet padding: http://cs.unc.edu/~fabian/papers/tissec2010.pdf http://cs.unc.edu/~fabian/papers/tissec2010.pdf EDIT: Also: http://www.cs.unc.edu/~fabian/papers/foniks-oak11.pdf http://www.cs.unc.edu/~fabian/papers/foniks-oak11.pdf