Jim Irrer Atul Prakash Patrick McDaniel Antigone: Policy-based Secure Group Communication System and AMirD: Antigone-based Secure File Mirroring System. 44-46 2003 conf/discex/2003 DISCEX (2) http://doi.ieeecomputersociety.org/10.1109/DISCEX.2003.1194910 db/conf/discex/discex2003.html#IrrerPM03