SSCP Question #6: Real Exam Question with Answer & Explanation

The correct answer is C: Bell and LaPadula.. In 1973 Bell and LaPadula created the first mathematical model of a multi-level security system. The following answers are incorrect: Diffie and Hellman. This is incorrect because Diffie and Hellman was involved with cryptography. Clark and Wilson. This is incorrect because Bell

Submitted by zhang_li· Apr 18, 2026Access Controls

Question

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

Options

ADiffie and Hellman.
BClark and Wilson.
CBell and LaPadula.
DGasser and Lipner.

Explanation

In 1973 Bell and LaPadula created the first mathematical model of a multi-level security system. The following answers are incorrect: Diffie and Hellman. This is incorrect because Diffie and Hellman was involved with cryptography. Clark and Wilson. This is incorrect because Bell and LaPadula was the first model. The Clark- Wilson model came later, 1987. Gasser and Lipner. This is incorrect, it is a distractor. Bell and LaPadula was the first model.

Topics

#Security Models#Bell-LaPadula Model#Multilevel Security#Access Control Models

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