Bell-Lapadula — CISSP Practice Questions
The Bell-LaPadula model is a formal state-machine security model designed to enforce confidentiality in systems that handle classified information, based on mandatory access control and sensitivity labels. It is governed by two primary rules: the Simple Security Property, which prohibits a subject from reading an object at a higher classification level, and the Star Property, which prohibits writing to an object at a lower classification level. The CISSP exam tests candidates on how Bell-LaPadula supports military-style multilevel security requirements and how its rules prevent unauthorized upward information flow. Candidates should also understand its limitations, particularly that it does not address integrity or availability, which are covered by complementary models such as Biba.
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- An organization's access control system enforces the Bell-LaPadula model. A user with secret clearance attempts to read a top-secret document. Which security principle prevents this access? Unlock answer & explanation →
- In the Bell-LaPadula security model, which principle PRIMARILY prevents unauthorized disclosure of information? Unlock answer & explanation →