1. (10 pts) Consider the security levels TS, S, C, and U ordered as follows: Let
ID: 3751589 • Letter: 1
Question
1. (10 pts) Consider the security levels TS, S, C, and U ordered as follows: Let C1, C2, and C3 be the categories. Consider the rights r (read) and w (write) that a subject can have over an object. In each of the following situations, specify which type of access (read, write, both, or none) is allowed. Explain. a. Paul, cleared for (TS,IC, C3]), wants to access a document classified (S, C2, Ca). b. Anna, cleared for (C, {C3)), wants to access a document classified (C, fC2]) c. Jesse, cleared for (S, C3]), wants to access a document classified (C, C3). d. Sammi, cleared for (TS, 1C1, C3), wants to access a document classified (C, C). e. Robin, who has no clearances (and so works at the U level), wants to access a document classified (C,C2)Explanation / Answer
Answer)
a. Paul can only read the document classified as S,(C2,C3) as he has TS access for C1, C3.
b. Anna cannot access C,C2 as she has access only for C,C3.
c. Jesse can have read/write access for C,C3 as he has access for S,C3.
d. Sammi is cleared for TS,C1, C3 and thus he can read/write C, C1.
e. Robin will not have any accesses to C, C2. Thus he will not read or write.
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