Memory management in TCSEC levels B3 and A1 operating systems may utilize "data hiding"
What does this mean?
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A. B. C. D.A.
Data Hiding is protecting data so that it is only available to higher levels this is done and is also performed by layering, when the software in each layer maintains its own global data and does not directly reference data outside its layers.
The following answers are incorrect: Auditing processes and their memory addresses cannot be accessed by user processes.
Is incorrect because this does not offer data hiding.
Only security processes are allowed to write to ring zero memory.
This is incorrect, the security kernel would be responsible for this.
It is a form of strong encryption cipher.
Is incorrect because this does not conform to the definition of data hiding.
Memory management is an important aspect of operating systems that affects the security of the system. In the context of the Trusted Computer System Evaluation Criteria (TCSEC), which is commonly referred to as the Orange Book, memory management is considered as one of the important security features that should be implemented in the operating system.
In TCSEC, there are several levels of security that an operating system can achieve, ranging from Level D to Level A1, with Level A1 being the highest level of security. The B3 and A1 levels are relatively high levels of security and have stricter requirements for memory management.
Data hiding is a memory management technique that can be used in B3 and A1 level operating systems to protect sensitive data from unauthorized access. Data hiding is implemented by layering the system functions and ensuring that none of the functions in a given layer can access data outside that layer.
This means that only the authorized functions that are allowed to access the sensitive data can do so, while other functions in the system are not able to access the data. The layers are designed to be self-contained, with each layer having a specific function and only being able to access the data that it needs to perform that function.
Data hiding is a form of access control that can help prevent unauthorized access to sensitive data in the operating system. It ensures that only authorized functions have access to the data and that other functions in the system are not able to access the data, even if they are compromised.
In summary, data hiding is a memory management technique used in B3 and A1 level operating systems to protect sensitive data from unauthorized access. It is implemented by layering the system functions and ensuring that only authorized functions have access to the data, while other functions in the system are not able to access the data.