Charles V. Wright Lucas Ballard Scott E. Coull Fabian Monrose Gerald M. Masson Spot Me if You Can: Uncovering Spoken Phrases in Encrypted VoIP Conversations. 35-49 2008 IEEE Symposium on Security and Privacy http://doi.ieeecomputersociety.org/10.1109/SP.2008.21 conf/sp/2008 db/conf/sp/sp2008.html#WrightBCMM08