Anour F. A. Dafa-Alla Eun Hee Kim Keun Ho Ryu Yong Jun Heo PRBAC: An Extended Role Based Access Control for Privacy Preserving Data Mining. 68-73 2005 conf/ACISicis/2005 ACIS-ICIS http://doi.ieeecomputersociety.org/10.1109/ICIS.2005.103 db/conf/ACISicis/ACISicis2005.html#Dafa-AllaKRH05