(3) Why is it that the Protection Matrix is almost never implemented directly in practice? How a. does using ACLs or capabilities make matters better? (2) What is easy to determine using capabilities but hard to determine with ACLs? Explain. (2) Why is revocation hard to do with capabilities? Explain (3) Why are computer viruses that infect applications more often a problem on personal b. c. d. computers than they are on time-shared systems? Explain.
OR
OR