Given the security levels TOP SECRET,SECRET,CONFIDENTIAL and UNCLASSIFIED(ordere

Question

Given the security levels TOP SECRET,SECRET,CONFIDENTIAL and UNCLASSIFIED(ordered from highest to lowest) and the categories A,B and C,specify what type of access (read,write ,both or neither) is allowed in each of the following situations .Assume that discretionary access controls allow anyone access unless otherwise specified.

a.Paul ,cleared for (TOP SECRET,{A,C}),wants to access a document classified (SECRET,{B,C}).

b.Anna ,cleared for(CONFIDENTIAL,{C}),wants to access a document classified (CONFIDENTIAL,{C}).

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

d. Sammi cleared for (TOP SECRET,{A,C}),wants to access a document classified(CONFIDENTAL,{A}.

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

Explanation / Answer

a. Paul has the highest level of read access. So he can read a SECRET document He can write a document only if his access C=both.

b. Anna can access the document which is at equal access level to her, if C= both , else if C=neither then there will be no access.

c. Jesse can access document since it is at lower level to her. if C=both , she cannot access if C= neither

d. Sammi can also access since he is at higher level . Even if C= both or neither it doesnt matter because he already has read access.(A)

e. Robin cannot access any document for either read or write access.

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