Task 1: Review Questions

Anwers the following questions on a separate sheet during lectue and submit. Students should perform this task individually.

1. List ways in which secret keys can be distributed to two communicating parties.

2. What is the difference between a session key and a master key?

3. What is a key distribution center?

4. What entities constitute a full-service Kerberos environment?

5. In the context of Kerberos, what is a realm?

6. What are the principal differences between version 4 and version 5 of Kerberos?

7. What is a nonce?

8. What are two different uses of public-key cryptography related to key distribution?

9. What are the essential ingredients of a public-key directory?

10. What is a public-key certificate?

11. What are the requirements for the use of a public-key certificate scheme?

12. What is the purpose of the X.509 standard?

13. What is a chain of certificates?

14. How is an X.509 certificate revoked?

Task 2: Problems
Anwers the following questions on a separate sheet during lectuer and submit. Students should perform the steps in this task individually.

1. A salesperson at a high-end computer security firm wants to sell you a protective cover for your passport, which contains an RFID tag inside storing your sensitive information. The salesperson's solution costs \only" $79.99 and protects your passport from being read via radio waves while it is in your pocket. Explain how you can achieve the same thing for under $3.00.

2. What are the types of tickets and servers used in Kerberos?