Bell-LaPadula
The Bell-LaPadula state machine model enforces confidentiality. The Bell-LaPadula model uses mandatory access control to enforce the DoD multilevel security policy. For a subject to access information, he must have a clear need to know and meet or exceed the information’s classification level.
The Clark-Wilson model can be applied to banking systems to ensure the integrity of customer data and financial transactions. For example, each user, such as a manager, accountant, or teller, would be assigned a role with limited privileges based on their job responsibilities.
The Bell-LaPadula model is a formal model for enforcing access control policies, particularly in government and military environments. It is based on the principles of confidentiality and information flow control.
The Harrison-Ruzzo-Ullman model is a security model that dictates that subjects can only access objects through applications.
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