Songqing Chen Shiping Chen Huiping Guo Bo Shen Sushil Jajodia Efficient Proxy-Based Internet Media Distribution Control and Privacy Protection Infrastructure. 209-218 2006 IWQoS http://dx.doi.org/10.1109/IWQOS.2006.250470 conf/iwqos/2006 db/conf/iwqos/iwqos2006.html#ChenCGSJ06