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Which of the following models uses separation of duties to prevent authorized users from making changes that are not desirable?
Graham-Denning Model
Clark-Wilson Model
Biba Model
Brewer-Nash Model
The correct answer is Clark-Wilson Integrity Model. This provides separation of duties by establishing a system of subject-program-object bindings such that the subject does not have direct access to the object.
Brewer-Nash is incorrect because it is a confidentiality model, not integrity.
Graham-Denning is concerned with how subjects and objects are created, assigned rights and how ownership is managed.
Biba is an integrity model to prevent unauthorized subjects from modifying objects. This differs from the question which specifies AUTHORIZED.
Reference???
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