Course

Electives in Cyber Security

Unit I

Classical ciphers and cipher strength

Basics of number theory, Encryption and Decryption of monoalphabetic and polyalphabetic ciphers. Cryptanalysis. Perfect Secrecy-Information and Entropy – Source Coding, Channel Coding, and Cryptography – Product cryptosystems.

Unit II

Symmetric Key Cryptography

Foundations of Modern Cryptography: Symmetric Cryptosystems: Substitution Permutation Networks – DES and Enhancements – AES and its Modes, Blowfish.

Unit III

Asymmetric Key Cryptography

Foundations of Asymmetric Key Cryptography – RSA Cryptosystem – Attacks on RSA Discrete Logarithm Problem and related algorithms – El-Gamal Cryptosystem – Elliptic curve cryptography

Course Objectives

• The course will cover how cryptography (symmetric and asymmetric) works, how security is analyzed theoretically, and how exploits work in practice.
• It will also present Cryptanalysis attacks against the cryptographic techniques, and attack models.

Course Outcomes

CO1: Understand classical cryptography techniques and apply cryptanalysis.

CO2: Analyze measures for securing cryptosystem.

CO3: Apply and analyze operations on Feistel and non-Feistel structures.

CO4: Apply asymmetric encryption techniques for securing messages.

CO-PO Mapping

Evaluation Pattern: 70:30

* CAT – Can be Quizzes, Assignment, and Reports

* CAL – Can be Lab Assessments, Projects, and Reports

**End Semester can be theory examination/ lab-based examination/ project presentation

Textbook(s)

Stallings W. “Cryptography and network security: principles and practice”. Upper Saddle River: Pearson; 2018. Padmanabhan TR, Shyamala C K, and Harini N. “Cryptography and Security”, First Edition, Wiley India Publications; 2011.

Reference(s)

Forouzan BA. “Cryptography & network security”. McGraw-Hill, Inc.; 2007 Feb 28.