(1)(25%): Revisit the Saltzer paper on Multics.

A (9%): Identify architectural elements of the Multics design that leverage the security architecture concepts of (i) isolation/zones and (ii) interface restriction.

B (8%): Saltzer mentions Secondary Storage Residues as a vulnerability in the system. Their exploitation would be a violation of what security property? Identify a potential remedy to this vulnerability.

C (8%): The Multics designers briefly considered a Trap Extension to their Access Control scheme. Discuss the positive and negative aspects of this approach related to the secure design principles of 1. least privilege, 2. economy of mechanism, and 3. complete mediation.

Note: Do not give answer from ChatGpt.