· Read 7.1.
§ What are the points of confidentiality violation?
§ What is the difference between link and end-to-end encryption? What are advantages and disadvantages of each?
§ Look at table 7.1.
§ What is the implication of encryption in store-and-forward communication?
§ What is the drawback of application layer encryption? How to solve this?
§
· Read section 7.2.
§ Is it possible for an attacker to perform traffic analysis even if packet headers are encrypted? Why or why not?
§ What is traffic padding? Why is it useful?
· Read section 7.3 in details.
§ What is the significance of key distribution?
§ What are the challenges for a key distribution?
§ What is hierarchical key control? What is its significance?
§ Read about session key lifetime.
§ Read about transparent and decentralized key control schemes.
· Read section 7.4 briefly.
§ What is cryptographically generated random number?
§ What is its significance?