Slide 1 Network Security-1/1 CSE401n:Computer Networks Lecture 20 Network Security-1 Slide 2 Network Security-1/2 Friends and enemies: Alice, Bob, Trudy r well-known in network…
Slide 1 24-1 Last time □ Message Integrity □ Authentication □ Key distribution and certification Slide 2 24-2 This time □ Firewalls □ Attacks and countermeasures…