Which of the following is considered the first security mode

Which of the following is considered the first security model to be based on confidentiality?

A. Biba

B. Bell-LaPadula

C. Graham-Denning

D. Clark-Wilson

Solution

B. Bell-LaPadula was the first model to address the concerns of confidentiality. It was developed in the 1970s and was considered groundbreaking because it supported multilevel security. Although it is well suited for the DoD and government, it is not well suited for modern commercial entities. Answer A is incorrect because the Biba model is an integrity model. Answer C is incorrect because the Graham-Denning model was not the first model to be developed on integrity. Answer D is incorrect because the Clark-Wilson model is another example of an integrity model.