Which of the following models does NOT include data integrity or conflict of interest?
Correct Answer: C
Explanation/Reference:
Explanation:
In the 1970s, the U.S. military used time-sharing mainframe systems and was concerned about the security of these systems and leakage of classified information. The Bell-LaPadula model was developed to address these concerns. It was the first mathematical model of a multilevel security policy used to define the concept of a secure state machine and modes of access, and outlined rules of access.
An important thing to note is that the Bell-LaPadula model was developed to make sure secrets stay secret; thus, it provides and addresses confidentiality only. This model does not address the integrity of the data the system maintains-only who can and cannot access the data and what operations can be carried out.
Incorrect Answers:
A: The Biba model deals with data integrity.
B: The Clark-Wilson model deals with data integrity.
D: The Brewer and Nash Model deals with conflict of interest. In this model, no information can flow between the subjects and objects in a way that would create a conflict of interest.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 370