
668 CHAPTER 21. COMPUTER SECURITY
Figure 21.13 In BGPlay, nodes represent Autonomous Systems, and paths are sequences
of Autonomous Systems to be traversed to reach the destination (thumbnail of image
from [BMPP04]).
21.4 Access Control
This section considers selected graph-based visualization techniques for several aspects of
access control.
21.4.1 Rule-Based Access Control
The RubaViz system [MFG
+
06] is a graphical tool for managing and querying rule-based
access control systems (see Figure 21.14). RubaViz makes it easy to answer questions like
“What group has access to which files during a given time span?”
The system constructs a graph whose nodes