Given the security levels TOPSECRET, SECRET, CONFIDENTIAL, and UNCLASSIFIED (ord

Question

Given the security levels TOPSECRET, SECRET, CONFIDENTIAL, and UNCLASSIFIED (ordered from highest to lowest), and the categories A, B, and C, say what type of access (read or write) is allowed according to the Bell-La Padula model in the following situations.

Assume discretionary access controls allow anyone access unless otherwise specified.

1. Paul, cleared for (TOPSECRET, A, C), wants to access a document classified (SECRET, C).

2. Anna, cleared for (CONFIDENTIAL, C), wants to access a document classified (CONFIDENTIAL, B).

3. Jesse, cleared for (SECRET, C), wants to access a document classified (CONFIDENTIAL, C).

4. Sammi, cleared for (TOPSECRET, A, C), wants to access a document classified (CONFIDENTIAL, A).

5. Robin, who has no clearances (and so works at the UNCLASSIFIED level), wants to access a document classified (CONFIDENTIAL, B).

Explanation / Answer

2. Anna, cleared for (CONFIDENTIAL, C), wants to access a document classified (CONFIDENTIAL, B).

5. Robin, who has no clearances (and so works at the UNCLASSIFIED level), wants to access a document classified (CONFIDENTIAL, B).

doesnot meet required security levels and so fails to open respective documents

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