Lecture 8: Network Security

17 March, 2014.

This week we will look at network security at the application, transport, and network layer. We will skip the mathematics involved (there are other modules for that) and focus on the concepts that enable secure communication via SSL and IPsec.

Slides: PDF

Please read the following sections in the textbook. Reading:

  • 1.6 Networks Under Attack
  • 8.1 What is Network Security?
  • 8.2 Principles of Cryptography (exclude 8.2.1)
  • 8.2.2 Public Key Encryption (exclude RSA and subsequent paragraphs)
  • 8.3 Message Integry and Digital Signatures
  • 8.4 End-Point Authentication
  • 8.6 Securing TPC Connections: SSL (exclude 8.6.2)
  • 8.7 Network-Layer Security: IPsec and VPN (exclude 8.7.5)
  • 8.9 Firewalls and Intrusion Detection Systems (FYI only)
This entry was posted in lecture.

2 comments to Lecture 8: Network Security

  1. Su Han says:

    Hi Prof, I just wonder whether this lecture has screencast or not, if yes, could you please upload it?

  2. A0105574 says:

    Hello, all! In the last part about the IPSec protocol, I notice that m=EB(IP data gram +padding), and h= H(i+n+m,MB). Does this mean that we encrypt the msg as m, and then hash this m with MAC key and other stuff to create h, then send m and h over the network? Cause in SSL protocol, the thing we send is m’ and h, and the h uses the original msg not the encrypted one. Thanks a lot if anyone can help clarify!

Leave a Reply