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UBE 528
NETWORK SECURITY
2016-2017 SPRING


 

Catalog Data: Network Security, 3 hour lectures
Principles of Network Attacks and Defenses, Cryptography, Authentication and E-mail security

Instructor: PROF.DR.M.E.DALKILIC


Textbooks

         Counter Hack, 2nd. Ed., Ed Skoudis, 2005

         W. Stallings, Cryptography and Network Security: Principles and Practice, 4th ed., Prentice-Hall, 2006

         C. Kaufman, R. Perlman and M. Speciner, Network Security 2nd ed, Pren-Hall,2003

 

Referenences

         Computer Networking, 6th ed. Kurose and Ross, 2013


Goals: A survey of network security technology. Each of the basic building blocks of network security, including conventional and public-key cryptography, authentication, and digital signatures are covered. In addition methods for countering hackers and viruses are explored. The course covers important network security applications such as PGP, PEM, Kerberos, and X509, DSS security

Prerequisites: Fundamental Concepts in Computer Networks, Graduate standing

 

Topics:

 

         Introduction

         Attacks

         Hash functions

         User/Web authentication

         Symmetric Encryption

         Attacks, Denial of Service

         Spam, Antispam

         Wi-fi, RFID, VoIP security

         Intruders, viruses and worms

         Public key cryptography

         PKI and certificates

         IP and WEB security

         Firewalls

         Anonimity networks

 



Grading (tentative):

  • Homeworks 20%
  • Midterm, 25%
  • Project, 20%
  • Final Exam, 35%

 

 

Useful material mostly from Keith Rossís Network Security Course

 

Project Dates:

Proposal : April 19th, 2017 (e-mail  to mehmet.emin.dalkilic@ege.edu.tr)

Presentation :  last week of the term i.e., May 31st 2017 (in class)

Report :  During the presentation (submit hard copy)

Individual or two-people projects are allowed

         Implementation projects or literature survey/ product security analysis type projects are accepted

         All Reports and Presentations will be in TURKISH!

         Sample Project topics:

1.      Internet Privacy

2.      Internet anonymity

3.      Malware

4.†† Steganography

5.      Digital Watermarking

6.      Mobile (electronic) signature

7.      Smart Card applications

8.      Authentication applications- BAN Logic

9.      secure electronic voting

10.  e-money (bitcoin)

11. Latest Firewall technology

12. Latest IDS technology

13. White box cryptography

 

Homework #1 (due: March 1st, 2017)

1.Five layer Network model (Application, Transport, Network, Data Link, Physical), briefly explain the function of each layer.

2. For each layer mentioned above list the most important protocol or protocols (at most two for each layer) and briefly explian what does each protocol do.

 

Homework #2

(Due date: March 15th, 2017)

1. Explain the Smurf Attack.

2. Explain source routing and spoofing attack using source routing.

3. Explain (switch) port stealing and its use in a session hijacking attack.

Hint: A good source is the text: Counter Hack, 2nd ed., Ed Skoudis, 2005.

 

Midterm Exam date: April 12th, 2017 Important Note: An A4 help sheet is allowed during the midterm exam. You can write (no photocoying allowed!) on both sides of the help sheet.

 

Homework #3

(Due date: March 29th, 2017)

Homework 3 typed

 

Homework #4

(Due date: April 5th, 2017)

1.Briefly describe the HMAC algorithm. Also explain the steps done on the sender and receiver when HMAC used for message authentication.

2. Explain, in a step by step fashion, the man in the middle attack against Diffie-Hellman Key Exchange Protocol.

3. Suppose Alice has a message that she is ready to send to anyone who asks. Thousands of people want to obtain Aliceís message, but each wants to be sure of the integrity of the message. In this context, do you think a MAC-based or a digital signature based integrity scheme is more suitable? Why?

4. Suppose Bob initiates a TCP connection to Trudy who is pretending to be Alice. During the Handshake, Trudy sends Bob Aliceís certificate. In what step of the SSL handshake algorithm will Bob discover that he is not communicating with Alice? Explain.

 

Homework #5

(Due date: April 12th, 2017)

Problems 10, 13, 20 ve 25 from Chapter 8 of Kurose&Ross, Computer Networking, 6th. ed.

Homework5typed

 

Also you may want to take a look at Problems 22 and 24 ExtraQuestionsTyped for exam preparation.

 

Homework #6 (LAST HOMEWORK)

(Due date: April 26th, 2017)

 

1.      What is the difference between a packet-filtering firewall and a proxy-server firewall? Can the two be used together?

 

2.      What are the four tables maintained by the Linux kernel for processing incoming and outgoing packets?

 

3.      How does an iptables based firewall decide as to which packets to subject to the INPUT chain of rules, which to the FORWARD chain of rules, and which to the OUTPUT chain of rules? Additionally, which part of a packet is examined in order to figure out whether or not the condition part of a rule is satisfied?

 

4.      Show how you would use the iptables command to reject all incoming SYN packets that seek to open a new connection with your machine?

 

 

5.      What is the option given to the iptables command to flush all the user-defined chains in a table? How do you flush all the rules in a table?

 

6.      What are the icmp-types associated with the echo-request (ping) and with the echo-reply (pong) packets?

 

7.      What is the iptables command if you want your machine to accept only the incoming connection requests for the SSHD server you are running on your machine? (You want your machine to drop all other connection request packets from remote clients.)

 

8.      What is connection tracking? How does an iptables-based firewall know that the incoming packets all belong to the same ongoing connection?

 

Source: Lecture 18 of Lecture Notes on Computer and Network Security by Avi Kak of Purdue University.

 


Send any comments or suggestions to dalkilic
Last revised in March, 10 1997

 

 

 

 

 

 

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