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In the Bell-Lapadula model, the simple security rule states that a subject that has a given security level cannot read data where?
That results at the same security level
That resides at a higher security level
That results at a lower security level
That results in an undefined security level
The correct response is that resides at a higher level of security. The simple security rule states the subject in a given security level cannot read data that is it that resides at a higher level of security.
The Bell–LaPadula (BLP) model is intended to address confidentiality in a multilevel security system (MLS).
The model defines two properties.
The Simple Security property: (A subject cannot read/access an object of a higher classification level (no read up).
And the * (star) property: A subject can only save an object at the same or higher classification (no write down)
ISC2 Official Study Guide 2018. Domain 3 Module 2, Security Models Pg. 201
Good Written question, please cite source!
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