School of Computer Science & Engineering
University of New South Wales
Advanced Operating Systems
COMP9242 2002/S2
Next: Issues for Protection System
Up: 03-caps
Previous: Access matrix model
- Rows define agents' protection domains
- Columns define objects' accessibility
- Dynamic data structure: frequent
- permanent changes (e.g. chmod)
- temporary changes (e.g. setuid)
- Very sparse with many repeated entries
- Usually not stored explicitly.
Gernot Heiser
2002-08-15