Wojciech Mazurczyk Krzysztof Szczypiorski Steganography of VoIP Streams. 1001-1018 2008 OTM Conferences (2) http://dx.doi.org/10.1007/978-3-540-88873-4_6 conf/otm/2008-2 db/conf/otm/otm2008-2.html#MazurczykS08