INFS 767 Fall 2000

Homework Assignment 2

Due in class 10/5/00

Read the following paper

Ravi Sandhu, “Role Activation Hierarchies.” Proc. Third ACM Workshop on Role-Based Access Control, Fairfax, Virginia, October 22-23, 1998, pages 33-40.

Paper is available at http://www.profsandhu.com/confrnc/rbac/pdf_ver/r98hier.pdf or in the ACM digital library.

Assignment: The ARBAC97 model is defined in terms of inheritance hierarchies. Discuss how ARBAC97 will need to be adapted to deal with the concept of Activation hierarchies.

Maximum 500 words. DO NOT EXCEED THIS LIMIT.