1 ACSAC 2002 © Mohammad al-Kahtani 2002 A Model for Attribute-Based User-Role Assignment Mohammad A. Al-Kahtani Ravi Sandhu George Mason University SingleSignOn.net,
SACMAT 03© Mohammad Al-Kahtani1 Induced Role Hierarchies with Attribute-Based RBAC Mohammad A. Al-Kahtani Ravi Sandhu George Mason University NSD Security,