Network Security Diagram

Course Information

CS 4404: Tools and Techniques - Computer Network Security
Term: A Term, 2016
Time: 2:00pm to 3:50pm
Days: Tuesdays and Fridays
Location: Kaven Hall 116

Course Catalog Description

This course introduces students to modern network security concepts, tools, and techniques. The course covers security threats, attacks and mitigations at the operating system and network levels (as opposed to the software level). Topics include: authentication, authorization, confidentiality, integrity, anonymity, privacy, intrusion detection and response, and cryptographic applications. Students will become familiar with modern security protocols and tools. Assignments will involve using security testing software to uncover vulnerabilities, network packet analyzers, and existing security applications to create secure network implementations. The course requires enough programming and systems background to understand attacks and use systems tools, but does not involve significant programming projects. Assignments and projects will use a Linux base for implementation. Students who have credit for CS 558 may not earn subsequent credit for this course. Recommended Background: Knowledge of operating systems (CS3013 or equivalent) and computer networks (CS3516 or equivalent). Familiarity with Linux or Unix is essential.

Teaching Staff

Course Instructor: Craig Shue
Email: please post via the class discussion board
Office: Fuller Labs 236
Office Hours: Mondays, 12pm-1pm; Tuesdays, 10am-11am. Appointments also available.

Teaching Assistant: Thomas Grimshaw
Office: Fuller Zoo Lab
Office Hours: Tuesdays, 4pm-6pm; Thursdays, 1:30pm-3:30pm

Schedule and Readings

Below is a list of readings for the class, along with deadlines for the Missions and Projects. All students are expected to have read the readings prior to arriving for class on the indicated date. Clicking on the reading assignment will allow the student to either view the reading or access a .zip archive of the reading assignments. The papers are numbered sequentially to make it easier for students to find the assigned reading.

Date Description Reading
Aug. 26, 2016 Introduction, Security Overview Chapter 1.1 to 1.5: Pfleeger and Pfleeger, "Is there a security problem in computing?", Security in Computing, 4th edition.
Aug. 26, 2016 MISSION Mission 1 Issued
Aug. 30, 2016 Legality and Ethics David Dittrich, Michael Bailey, Sven Dietrich. "Towards Community Standards for Ethical Behavior in Computer Security Research." Stevens CS Technical Report 2009-1, 20 April 2009.

A. Burstein, "Conducting cybersecurity research legally and ethically," in USENIX Workshop on Large- Scale Exploits and Emergent Threats (LEET), 2008.
Sept. 2, 2016 Authorization: Capabilities Craig A. Shue, Andrew J. Kalafut, Mark Allman, Curtis R. Taylor, "On Building Inexpensive Network Capabilities," ACM SIGCOMM Computer Communication Review, April 2012.
Sept. 2, 2016 MISSION Mission 1 Due, Mission 2 Issued
Sept. 6, 2016 Cryptography Chapter 1.1, 1.2, 1.4, 1.5, 1.6-1.9: A. Menezes, P. Van Oorschot, S. Vanstone. "Handbook of Applied Cryptography," CRC Press ISBN: 0-8493-8523-7, October 1996.
Sept. 9, 2016 Integrity Robert Topolski. "NebuAd and partner ISPs: Wiretapping, forgery and browser hijacking," Washington DC: FreePress, 2008.

Giuseppe Ateniese and Stefan Mangard. "A new approach to DNS security (DNSSEC)," ACM Conference on Computer and Communications Security, 2001.
Sept. 9, 2016 PROJECT Design Document Due
Sept. 13, 2016 Authentication: Passwords M. Weir, S. Aggarwal, M. Collins, and H. Stern, "Testing metrics for password creation policies by attacking large sets of revealed passwords," in Proceedings of the 17th ACM Conference on Computer and Communications Security, 2010, pp. 162 - 175.
Sept. 16, 2016 Authentication: Identity and Spoofing C. Shue, M. Gupta, M. Davy, "Packet Forwarding with Source Verification," Computer Networks, vol. 52, issue 8, pages 1567-1582, Jun. 2008.

J. Steiner, C. Nouman, J. Schiller, "Kerberos: An Authentication Service for Open Network Systems," USENIX conference proceedings, 1988.

(Quiz questions 1-3 on Sept. 16 will be on the Source Verification paper. Quiz question 4 on Sept. 20 will be on the Kerberos paper.)
Sept. 16, 2016 MISSION Mission 2 Due, Mission 3 Issued
Sept. 16, 2016 PROJECT Design Document Peer Review Due
Sept. 20, 2016 Authentication: Routing K. Butler, T. Farley, P. McDaniel, J. Rexford. "A Survey of BGP Security Issues and Solutions," Technical Report, AT&T Labs - Research, 2004.

Guest Lecture: Joshua Guttman and Katie McMackin from MITRE Corporation.
Sept. 23, 2016 Authorization: Intrusion Detection V. Paxson, "Bro: A system for detecting network intruders in real-time," Computer Networks, vol. 31, no. 23-24, pp. 2435 - 2463, 1999.
Sept. 23, 2016 PROJECT Evaluation Criteria Due
Sept. 27, 2016 Availability: Botnets S. Staniford, V. Paxson, and N. Weaver, "How to 0wn the Internet in your spare time," in Proceedings of the 11th USENIX Security Symposium, vol. 8, 2002, pp. 149 - 167.
Sept. 30, 2016 VPNs: IPSec C. Shue, Y. Shin, M. Gupta, J. Choi, "Analysis of IPSec Overheads for VPN Servers," IEEE International Conference on Network Protocols (ICNP) Network Protocol Security (NPSec) Workshop, Boston, MA, Nov. 2005.
Oct. 1, 2016 MISSION Mission 3 Due
Oct. 1, 2016 PROJECT Results Section Due, Evaluation Criteria Peer Review Due
Oct. 4, 2016 Privacy B. Greenstein, R. Gummadi, J. Pang, M. Chen, T. Kohno, S. Seshan, and D. Wetherall, "Can Ferris Bueller still have his day off? Protecting privacy in the wireless era," in Proceedings of the 11th USENIX Workshop on Hot Topics in Operating Systems. USENIX Association, 2007, p. 10.
Oct. 4, 2016 PROJECT Peer Review of Results Section Due
Oct. 7, 2016 Phishing C. Herley and D. Florencio, "A profitless endeavor: phishing as tragedy of the commons," in Proceedings of the 2008 ACM Workshop on New Security Paradigms, 2009, pp. 59 - 70.
Oct. 9, 2016 PROJECT Implementation and Final Report Due
Oct. 11, 2016 Web Security S. Stamm, Z. Ramzan, M. Jakobsson, "Drive-by Pharming," in Information and Communications Security, 2007.

Course Policies and Procedures

The following represent the official policies and procedures for the course. Please review this information and, if you have questions, discuss them with the professor as soon as possible.

Ethical Hacking Agreement

In this course, students will learn about security, both from a defender and an attacker's perspective. If these tools or techniques were misued, it could have negative ramifications for the student and university. To avoid any potential misunderstanding, students must submit an electronically signed Ethical Hacking Agreement form in the first week of class.

Students that do not sign an Ethical Hacking Agreement in the first week of class will effectively be dismissed from the class. These students will receive an NR grade for the course and will be unable to participate in the practical activities.

Official Communication

Class discussion, class hand-outs, emails to the student's WPI email account, the class discussion board, and the course Web pages are avenues for official course communication. Students are responsible for any information posted through these venues.


We will not be using an assigned textbook in this course. Students will be responsible for obtaining the reading from the links provided by the instructor and, if needed, printing it out for reading.


This course will use the InstructAssist system which has been developed for interactive instruction. This system features in-class components, including Quiz Bowls and Activities, as well as out-of-class components, such as assignment submission and grading feedback.

This course will use the ScoreKeeper module in InstructAssist. This module allows automatic evaluation and testing of student work, allowing students to rapidly learn about and address any errors.

You can access the InstructAssist system for this class at You will be required to log in through WPI's Central Authentication Service with your WPI credentials to access the system.


This course will make extensive use of out-of-class assignments called "Missions." Each mission will have a series of objectives that must be met by students in order to earn credit. There will be three missions, each with smaller phases. These missions may include a small programming or scripting component, though the focus will be on mastery of tools and techniques.

All missions must be performed independently, unless otherwise indicated. Students may discuss high-level ideas and provide advice to each other to help each other. However, all submitted work must be the result of the student's own efforts and should not include files or systems used by other students. If students have questions about the appropriate about of collaboration, they should contact their instructor.

These missions are designed to allow students to apply the network security concepts learned in class. Many, if not all, of these missions will make use of an isolated computer network to allow students to experiment without introducing risk to the WPI network. Students will be required to use this physically isolated network using a portable computer in which they have administrative access. A virtual machine will be provided to help students with their experiments.

The InstructAssist ScoreKeeper module will be used to test the student assignments and provide immediate feedback on the configuration. This module will also be used for course grading. This system is provided to make the course more productive and beneficial to the students. Any attempts to alter or otherwise falsify test results will be considered "cheating," an instance of academic misconduct, and will be subject to university penalties, including an NR grade in this course.

The ScoreKeeper module may provide feedback in the form of Achievement awards. This feedback will not be included in grading and is merely additional information that students may choose to use or disregard.

Some missions may be completely satisfied by using the ScoreKeeper system, while others may additionally require students to submit documentation, configuration files, or source code. Please check each mission specification to confirm what is required.

Each mission may have a different score weight associated with it. Students should not assume that all missions are of equal weight.

Programming Project

Each student will work on a term-long programming project, optionally with a partner. This project will re-examine a previously-created research project. The students will design the project, implement it, empirically evaluate it, and issue a report on their findings. A significant focus of the project will be on evaluating whether the system is effective at achieving its security goals and whether it perform acceptably in a variety of scenarios. Accordingly, the students would be advised that the implementation will be a relatively small portion of the exercise.

A rubric for the project describes each of these criteria in greater detail and assigns points to each deliverable and aspect of the project.

Peer Review for Project Deliverables

The project will be divided into deliverables with individual deadlines. For several components, the students will be expected to perform a "peer review" of other students' submissions. After the initial submission for peer-review components, the students will be randomly assigned to review the submissions from two other teams. The peer review will be a "double-blind" process: the author will not see the names of the reviewers, nor will the reviewers learn the authors's name. This both eliminates bias and protects student privacy. Naturally, the teaching staff will see all student names when grading. The peer review process is meant to be a learning experience.

While reviewing other students' work, a student is likely to get ideas that could help with their own project. All students are encouraged to revise their work based on the peer review feedback, and ideas from other students' projects, prior to final submission. However, while the peer review is to inspire revisions, the actual revisions must be the team's own work. Teams cannot simply copy the work of others and earn credit. As they revise their assignments, the teams must specifically indicate what alterations were made based on the peer review feedback. The grading process will evaluate both the team's original submission and the final one, with roughly equal credit assigned to both. Accordingly, teams have incentives to write a strong initial deliverable and to strengthen the final deliverable based on peer feedback.

Programming Languages

In this course, the relevant tools students use may impose programming languages constraints. Since this is a 4000-level Computer Science, students are expected to learn a new programming language on-the-fly as needed to complete their tasks. However, students often may select the tool they use, often allowing them to work with tools that use languages the students have mastered.

Since this course is focused on tools and techniques, we recommend students use higher-level languages, such as scripting languages, where possible, so long as the projects meet the underlying performance goals.

Course Participation and Professionalism

During lectures, students are to be focused on the course. Students should not use materials or electronic devices that would inhibit their attention to the course lecture and discussion. Laptops may only be used for note-taking purposes; transmission capabilities on these devices must be disabled and only appropriate note-taking applications may be used in class.

Students must treat each other and the teaching staff with respect at all times. Disagreement, debates, and criticism of ideas are healthy aspects of academic environments; however, students be careful to avoid demeaning language or comments which can be taken personally. The ability to handle conflict professionally and work with a variety of people is an acquired skill, yet it is increasingly important in technical careers.

Late Submission

No quizzes may be submitted late. No make-up quizzes will be available.

Missions and projects may be submitted late, but with significant penalties. Missions that are late, where t represents the amount of time late, will have the following penalties:

0 minutes < t ≤ 1 day10% deduction from maximum grade before the rest of the grading begins
1 day < t ≤ 3 days30% deduction from maximum grade before the rest of the grading begins
3 days < t ≤ 5 days50% deduction from maximum grade before the rest of the grading begins
5 days < tno credit will be awarded

Missions and projects are due at the exact minute specified, with all times rounded down to the nearest minute. The submission system is synchronized via NTP with the CS department servers. This time will be considered official.

A project that is submitted late may not be included in the peer review process. As a result, students may not have feedback or guidance from their peers for sections where they submit late.

Any missions or projects submitted after 4pm on Wednesday, October 12, 2016 will not be graded.

Course Grading

A description of each of the class components is as follows:

  • Quizzes (40%): The will be thirteen quizzes, each 10-15 minutes long, at the beginning of each class. The two lowest quiz scores will automatically be dropped, allowing for absences, illnesses, or simply "bad days". The quizzes will be short (1 printed page). The first set of questions will cover material from reading due before class and will be more factual (and simplistic) in nature. The final question will be more application-oriented, requiring students to apply concepts from prior class discussions to new challenges.
  • Missions (20%): There will be multiple missions in the course where students will apply concepts. These missions may have different point values and may have "checkpoint" deliverables in which students must show substantial progress towards completing the assignment.
  • Project (35%): There will be one term-long project that students may pursue in teams of up to two people. The project is described in greater detail above.
  • Participation and Professionalism (5%): Students are expected to be engaged in class, answering questions from the instructor and asking questions when needed. Students must regularly attend classes and show up to demonstration times they schedule. Disregard for course policies or unprofessional conduct with students or the teaching staff will be penalized. This grading component is a signed value, allowing students to earn a negative score for abusive behavior. Students that simply attend class each day and participate adequately in Quiz Bowls and Activities should expect to earn around an 85% in participation. Voluntary participation in discussion or the discussion board, via questions or comments, is required to earn full credit in this category.

BS/MS Graduate Credit

Students may take this course for graduate credit by students in the BS/MS Computer Science program. Students that are interested in obtaining graduate credit (equivalent to 2 graduate credits) will need to make the appropriate arrangements with the professor at the beginning of the class. Students should expect to make an in-class presentation and paper critique, as well as a minimum final course grade requirement, to obtain such credit.

Student Disabilities

If you need course adaptations or accommodations because of a disability, or if you have medical information to share with me, please make an appointment with me as soon as possible. If you have not already done so, students with disabilities who believe that they may need accommodations in this class are encouraged to contact the Office of Disability Services (ODS) as soon as possible to ensure that such accommodations are implemented in a timely fashion. This office is located in the West St. House (157 West St) and their phone number is 508.831.4908.

Academic Honesty

The WPI Academic Honesty Policy describes types of academic dishonesty and requirements in documentation. In the case of academic dishonesty, I am required to report the incident to the Dean of Student Affairs. Further, my penalty for academic dishonesty is to assign a NR grade for the course.