Network Security

Subject Code: IT/T/424

Credit Hours/Class: 

                    2 Periods/Lecture & 2 Lectures/Week

      - Theory Class 

Marks Distribution:  Two Class Test of 30 marks each of one hour duration.

                                    Final exam of 100 marks for 3 hours of written exam

Course Objectives:

• To provide solid foundation of the principal of Cryptographic algorithms including secret key cryptography, hashes and message digests, and public key algorithm.

• To provide an awareness of network security issues involving stand alone computers, locally networked computers and remotely networked computers.

• To encourage investigation into what factors are likely to result in successful network security.

• To provide foundations of the basic system security testing for vulnerabilities and procedures of backup and recovery.

Course Outcomes:

Provide students with a high‐level understanding of how information security functions in an organization. 

Topics will be covered on knowledge, professional skill, and attitude‐centric:

Knowledge:

    Explain the foundations of  Cryptography and network security

    Identify common network security vulnerabilities/attacks

    To master understanding external and internal threats to an organization

    Explain the basic concepts of symmetric & asymmetric cryptography

    To master fundamentals of secret and public cryptography

    Demonstrate detailed knowledge of the role of encryption to protect data.

    Explain the fundamental concepts of different digital signature schemes

    Identity security weaknesses in different networking environment 

    To master protocols for security services

    To be exposed to original research in network security

Professional Skill 

    Identify the appropriate cryptography scheme & security mechanism for different computing environment and information systems

    Analyze the security of different computer systems & networks

    To be familiar with network security designs using available secure solutions (such as PGP, SSL, IPSec, etc)

Attitude

    Develop a critical mind for evaluating the security of computer systems

Syllabus Outline:

    Part I:

            Overview (01), Symmetric Ciphers (03), Classical Encryption Techniques (02), Block Ciphers,

              Data Encryption Standard (04)

    Part II:

     Introduction to Finite Fields (04), Advanced Encryption Standard (04), Contemporary Symmetric 

      Ciphers (03), Confidentiality Using Symmetric Encryption (4.5), Public-Key Encryption and Hash

      Functions, Introduction to Number Theory, Public-Key Cryptography and RSA (09), Key Management

      (07); Other Public-Key Cryptosystems (07), Message Authentication and Hash Functions, Hash

      Algorithms

    Part III:

            Digital Signatures and Authentication Protocols (12,13), Network Security Practice 

              (12), Authentication Applications (13), Electronic Mail Security, IP Security, Web Security, System 

              Security, Intruders, Malicious Software, Firewalls, Standards and Standards-Setting Organizations.

    Part IV:

              Packet Filters, Enterprise Network Security, Anatomy of a Hack

Reference Books:

1. Stallings, William, Cryptography and Network Security Principles and Practices, 4th Edition, Pearson Edu., 2006.

2. Forouzan, Behrouz A., Cryptography and Network Security, 1st Special Indian Edition, TMH, 2007.

3. Kahate, Atul, Cryptography and Network Security, 2nd Ed., TMH, 2003.