Catalog Data: Network
Security, 3 hour lectures
Principles of Network Attacks
and Defenses, Cryptography, Authentication and E-mail security
Counter Hack, 2nd. Ed., Ed Skoudis,
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
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
Concepts in Computer
Networks, Graduate standing
Attacks, Denial of Service
Wi-fi, RFID, VoIP security
Intruders, viruses and worms
Public key cryptography
PKI and certificates
IP and WEB security
- Homeworks 20%
- Midterm, 25%
- Final Exam, 35%
Useful material mostly from Keith Rossís Network Security Course
Sample Midterm exam from year 2002 is here
Sample Final exam from year
2002 is here
April 15th, 2015 (e-mail to email@example.com)
∑ Presentation : last week of the term (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
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
(Due date: March 18th, 2015)
the Smurf Attack.
source routing and spoofing attack using source routing.
(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.
(Due date: April 1st, 2015)
Homework 2 typed
(Due date: April 8th, 2015)
the HMAC algorithm. Also explain the steps done
on the sender and receiver when HMAC used for message authentication.
the decryption process in DES. What are the decryption
equations for DES?
in a step by step fashion,
the man in the middle attack against Diffie-Hellman Key Exchange
4. a) 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?
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.
April 22nd, 2015)
Problems 10, 13, 20 ve 25 from Chapter 8 of Kurose&Ross, Computer
Networking, 6th. ed.
may want to take a look
at Problems 22 and 24 ExtraQuestionsTyped
for exam preparation.
(Due date: May 13th, 2015)
What is the difference between a packet-filtering
firewall and a proxy-server firewall? Can the two be used together?
the four tables maintained by the Linux kernel for processing incoming and outgoing packets?
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?
Show how you would use the
command to reject all incoming SYN packets that seek to
open a new connection with your machine?
What is the option given to the
command to flush all the
user-defined chains in
a table? How do you flush all the
rules in a table?
the icmp-types associated with the echo-request
(ping) and with the echo-reply
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.)
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