CISSP Question of the Day – 7-8-2016

Getting You Prepped for the CISSP Exam ...One Question at a Time!

Today’s CISSP question topic: Security Models

The ‘confinement property’ relates to which of the following?

  1. Bell-LaPadula’s star-property rule which states that a subject with a higher security label cannot write to an object with a lower security label.
  2. The Biba Model’s simple integrity axiom which states that subjects cannot read objects with a lower security label.
  3. The Biba Model’s star-integrity axiom which states that subjects cannot write to objects with a higher security label.
  4. Bell-Lapadula’s strong-star rule which states that subjects can only read and write to objects that have the same security label as the subject.
  5. The Clark-Wilson models Access Triple which requires that all subjects interact with objects via an intermediary.
  6. Bell-Lapadula’s simple-security rule which states that a subject cannot read objects with a higher security label.



Check Your Answer


  1. Bell-LaPadula’s star-property rule which states that a subject with a higher security label cannot write to an object with a lower security label.

Supporting Links:

  1. http://security.stackexchange.com/questions/3266/why-does-the-property-rule-of-the-bell-lapadula-model-allow-information-to-be
  2. http://cse.yeditepe.edu.tr/~odemir/fall2010/cse439/lecture11.pdf (PDF)


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About the Author

Colin Weaver

Colin Weaver is co-owner and lead instructor at ITdojo, Inc., a network security and information assurance training center and consulting firm located in Virginia Beach, VA. His passion for technology, networks, and security has led him to become enthralled with the idea of IPv6 and its implementation. In this blog he will share with you glimpses of what he has learned and a hint at what you’ll learn in his classes.