8. Suppose country X and country Y are engaged in a war. Country Y is trying to determine the secret headquarters of country Xs military leaders, which one can assume is directly related to how many messages are being sent/received to/from a given location. Why doesnt an encryption/decryption algorithm protect against the leakage of this information? Can you describe an engineering solution to this problem that prevents country Y from discovering the headquarters?

9. Discuss some of the inherent challenges of TCBs and TEEs. Provide at least two challenges for each.

10.Discuss in some detail in your own words three ways TEEs enforce security. Use a diagram if necessary:

11.Explain the interaction between users, application software, and hardware in context of protection rings discussed in lecture. Include all aspects including OS, VM, Hypervisor and SMM and describe the concept of isolation why it is critical for cybersecurity.