Yong-Seok Park Jaehwan Ahn Choon-Soo Kim Jae-Cheol Ryou A Real Time Voice Transmission Method for Voice Privacy between CDMA Mobile Network and PSTN. 1147-1152 2007 conf/mue/2007 MUE http://doi.ieeecomputersociety.org/10.1109/MUE.2007.48 db/conf/mue/mue2007.html#ParkAKR07