CompTIA Security+ Exam Prep

Answer: A - The Brewer and Nash model was created to provide access controls that can change dynamically depending upon a user’s previous actions and is known as the Chinese Wall model. The main goal of the model is to protect against conflicts of interest by users’ access attempts. This model is also based on an information flow model. No information can flow between subjects and objects in a way that would result in a conflict of interest. The model states that a subject can write to an object if, and only if, the subject cannot read another object that is in a different dataset.