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Who developed one of the first mathematical models of a…

Who developed one of the first mathematical models of a multilevel-security computer system?

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A.
Diffie and Hellman.

B.
Clark and Wilson.

C.
Bell and LaPadula.

D.
Gasser and Lipner.

Explanation:
The Bell-LaPadula model 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.
Incorrect Answers:
A: Diffie and Hellman developed the first asymmetric key agreement algorithm, not the first multilevel security
policy computer system.
B: The question asks for the developers of the first mathematical models of a multilevel-security computer
system. This was Bell and LaPadula, not Clark and Wilson.
D: The question asks for the developers of the first mathematical models of a multilevel-security computer
system. This was Bell and LaPadula, not Gasser and Lipner.
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 369, 812


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