Alexandre Passito Edjair de Souza Mota Edjard Mota Analysis of the secure RTP protocol on voice over wireless networks using extended MedQoS. 86-87 2009 SAC http://doi.acm.org/10.1145/1529282.1529299 conf/sac/2009 db/conf/sac/sac2009.html#PassitoMM09