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

Who developed one of the first mathematical models of a multilevel-security computer system?
A .  Diffie and Hellman.
B .  Clark and Wilson.
C .  Bell and LaPadula.
D .  Gasser and Lipner.

View Answer

Answer: C

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.