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1. What is MAC? What is discretionary access control?
2. Given Example on p. 69, draw the lattice diagram. Given two security levels, decide whether one dominates the other. Justify your answer.
3. A system has two security classifications, TS and S, with TS>=S. The system has three categories, COMP, NUC and ASIA.
a. List all the security levels (pairs of classification and category subset).
b. Draw the lattice diagram. Draw security level (L1, C1) above security level (L2, C2) and draw a line between security level (L1, C1) and security level (L2, C2) if and only if security level (L1, C1) dominates security level (L2, C2).
Pseudo-random generators, pseudo-random functions and pseudo-random permutations
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Why are timestamps used in the Kerberos protocol - When Alice is on a trip, she tries to store an important message in the CEO's account directory.
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You have taken a job with a software user who has contracted your previous employer to develop a system for them. However, you have also a responsibility of confidentiality to your previous employer.
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