1. Data and Applications Security Developments and Directions Dr. Bhavani Thuraisingham The University of Texas at Dallas Lecture #12 Secure Object Data Management Systems February 17, 2005

2. Outline l Background on object systems l Discretionary security l Multilevel security l Objects for modeling secure applications

3. Concepts in Object Database Systems l Objects- every entity is an object - Example: Book, Film, Employee, Car l Class - Objects with common attributes are grouped into a class l Attributes or Instance Variables - Properties of an object class inherited by the object instances l Class Hierarchy - Parent-Child class hierarchy l Composite objects - Book object with paragraphs, sections etc. l Methods - Functions associated with a class

4. Example Class Hierarchy Document Class D1 D2 Book Subclass B1 # of Chapters Volume # Print-doc-att(ID) Method1 : Journal Subclass J1 Print-doc (ID) Method2: ID Name Author Publisher

5. Example Composite Object Composite Document Object Section 1 Object Section 2 Object Paragraph 1 Object Paragraph 2 Object

6. Security Issues l Access Control on Objects, Classes, Attributes etc. l Execute permissions on Methods l Multilevel Security l Security impact on class hierarchies l Security impact on composite hierarchies

7. Objects and Security Secure OOM Unified Object Model is Evolving Secure OODB Persistent data store Secure OODA Design and analysis Secure DOM Infrastructure Secure OOPL Programming language Secure Frameworks Business objects Secure OOT Technologies

8. Access Control

9. Access Control Hierarchies

10. Secure Object Relational Model

11. Policy Enforcement

12. Sample Systems

13. Multilevel Security

14. Some Security Properties l Security level of an instance must dominate the level of the class l Security level of a subclass must dominate the level of the superclass l Classifying associations between two objects l Method must execute at a level that dominates the level of the method

15. Multilevel Secure Object Relational Systems

16. Sample MLS Object Systems

17. Objects for Secure Applications

18. Object Modeling

19. Dynamic Model

20. Functional Model

21. UML and Policies

22. Directions l Many of the concepts have been transferred to Object Relational data systems such as Oracle 8i and beyond l UML for Security applications is becoming common practice l Secure distributed object systems has gained popularity l Evolution into secure object-based middleware l Secure object-based languages l Integrating security and real-time for object systems