Final answer:
The flow of information in the LBAC model is controlled by the simple security, star property, and strong star property rules, which enforce various levels of access based on security clearance.
Step-by-step explanation:
The processes that control the flow of information in the lattice-based access control (LBAC) model are simple security, star property, and strong star property rules. These rules are based on mathematical concepts that govern how subjects (like users or processes) can access objects (like files or databases) based on their security clearance levels within a lattice structure.
Simple security, also known as the 'no read up' policy, states that a subject can only read an object if the security level of the subject is greater than or equal to the object's security level. The star property, or 'no write down' rule, ensures that a subject can only write to an object if the object's security level is higher than or equal to that of the subject. The strong star property extends the star property and stipulates that the subject can only append to objects at a higher or equal security level. This set of properties helps enforce security by controlling the access and flow of information, preventing data from being leaked to subjects with lower security clearances.