Question VII: (12 marks) Trusted Computing and Multilevel Security a) Consider BLP policy and Biba policy (strict integrity policy): Briefly describe how BLP policy and Biba policy regulate read/write, respectively. 14 pt BLP Read Write b) Suppose the Chinese Wall Policy is enforced. [pt] Open Colla Suppose Alice has already read object4, list all the objects she can she read now c) Consider a BLP system with the following clearances (classifications) and category sets. 3 clearances/classifications: USSSTS 3 category sets: ASIA, EUR, USL EUR, USUS (Notice: don't consider other unlisted category sets, like (ASIA) or (EUR). They won't appear in the system) Assuming Alice is assigned the security level (L. (ASIA EURUSI), list all the security levels of objects) that she can read and all the security levels of objects) that she can write by BLP policy. 4 pt] Question VII: (12 marks) Trusted Computing and Multilevel Security a) Consider BLP policy and Biba policy (strict integrity policy): Briefly describe how BLP policy and Biba policy regulate read/write, respectively. 14 pt BLP Read Write b) Suppose the Chinese Wall Policy is enforced. [pt] Open Colla Suppose Alice has already read object4, list all the objects she can she read now c) Consider a BLP system with the following clearances (classifications) and category sets. 3 clearances/classifications: USSSTS 3 category sets: ASIA, EUR, USL EUR, USUS (Notice: don't consider other unlisted category sets, like (ASIA) or (EUR). They won't appear in the system) Assuming Alice is assigned the security level (L. (ASIA EURUSI), list all the security levels of objects) that she can read and all the security levels of objects) that she can write by BLP policy. 4 pt]