Cryptography and Network Security

NPTEL and Indian Institute of Technology, Kharagpur via YouTube

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Details

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Provider

YouTube
Pricing

Free Video
Languages

English
Effort

1 day 12 hours
Sessions

Self-Paced
Level

Intermediate

Found in

Instructor: Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur.

The course deals with the underlying principles of cryptography and network security. It develops the mathematical tools required to understand the topic of cryptography. Starting from the classical ciphers to modern-day ciphers, the course provides extensive coverage of the techniques and methods needed for the proper functioning of the ciphers. The course deals with the construction and cryptanalysis of block ciphers, stream ciphers and hash functions. The course defines one-way functions and trapdoor functions and presents the construction and cryptanalysis of public-key ciphers, namely RSA. The key exchange problem and solutions using the Diffie-Hellman algorithm are discussed. Message Authentication Codes (MAC) and signature schemes are also detailed. The course deals with modern trends in asymmetric key cryptography, namely using Elliptic Curves. The course concludes with the design rationale of network protocols for key exchange and attacks on such protocols.

Syllabus

Introduction.
Overview on Modern Cryptography.
Introduction to Number Theory.
Probability and Information Theory.
Classical Cryptosystems.
Cryptanalysis of Classical Ciphers.
Shannons Theory.
Shannons Theory (Contd...1).
Shannons Theory (Contd...2).
Symmetric Key Ciphers.
Block Cipher Standards (DES).
Block Cipher Standards (AES).
Block Cipher Standards (AES) (Contd.).
Linear Cryptanalysis.
Differential Cryptanalysis.
Few other Cryptanalytic Techniques.
Overview on S-Box Design Principles.
Modes of Operation of Block Ciphers.
Stream Ciphers.
Stream Ciphers (Contd...1).
Stream Ciphers (Contd...2).
Pseudorandomness.
Cryptographic Hash Functions.
Cryptographic Hash Functions (Contd...1).
Cryptographic Hash Functions (Contd...2).
Message Authentication Codes.
More Number Theoretic Results.
The RSA Cryptosystem.
Primality Testing.
Factoring Algorithms.
Some Comments on the Security of RSA.
Discrete Logarithm Problem (DLP).
The Diffie-Hellman Problem and Security of ElGamal Systems.
An Introduction to Elliptic Curve Cryptography.
Application of Elliptic Curves to Cryptography.
Implementation of Elliptic Curve Cryptography.
Secret Sharing Schemes.
A Tutorial on Network Protocols.
System Security.
Firewalls and Intrusion Detection Systems.
Side Channel Analysis of Cryptographic Implementations.

Taught by

nptelhrd

Reviews

4.7 rating, based on 11 Class Central reviews

Start your review of Cryptography and Network Security

Atul Chauhan

This course on

Cryptography and Network Security is very helpful for understanding core concepts in a simple way. The lectures are well-structured and easy to follow, even for beginners. Topics like encryption, hashing, and network security are explained clearly with good examples. It is especially useful for students preparing for exams or building a strong base in cybersecurity. Overall, a great course for both academic learning and practical
Ayush Choudhary

The Cryptography and Network Security course on NPTEL via is an excellent learning resource for students interested in cybersecurity and secure communication. The lectures explain complex concepts like encryption, digital signatures, authentication, and network security protocols in a clear and structured way. The instructors use practical examples that make understanding easier, even for beginners. The course content is well-organized and suitable for computer science students preparing for exams or building foundational knowledge. Overall, it is a highly informative, free, and reliable platform to learn cryptography and network security in a simple and effective manner
Abhishek Pandey

This course provides a well-structured and comprehensive learning experience. The concepts are explained clearly, making it easy to understand both fundamental and advanced topics. The content is organized logically, allowing learners to build knowledge step by step. Practical examples and real-world applications help in strengthening understanding and improving problem-solving skills. The assignments and discussions encourage active participation and critical thinking. Overall, the course is informative, engaging, and valuable for academic as well as professional growth. It offers a strong foundation and enhances technical confidence, making it a worthwhile addition to any learning journey.
Abhay Pratap Singh

This course provides a well-structured and comprehensive learning experience. The concepts are explained clearly, making it easy to understand both fundamental and advanced topics. The content is organized logically, allowing learners to build knowledge step by step. Practical examples and real-world applications help in strengthening understanding and improving problem-solving skills. The assignments and discussions encourage active participation and critical thinking. Overall, the course is informative, engaging, and valuable for academic as well as professional growth. It offers a strong foundation and enhances technical confidence, making it a worthwhile addition to any learning journey.
Anushka Bairoliya

The Cryptography course was extremely informative and well-structured. It provided a strong foundation in encryption techniques, hashing algorithms, digital signatures, and network security concepts. Complex topics like symmetric and asymmetric encryption were explained clearly with practical examples, making them easy to understand. The hands-on exercises helped strengthen my understanding of real-world applications of cryptography in cybersecurity. Overall, this course enhanced my knowledge of data protection and secure communication, and it is highly recommended for anyone interested in cybersecurity or computer science.
Ishika Jain

This courses is very useful for me and I learn many new concepts from this . The way of telling i easily understand and adapt fastly . It is such a great platform that i found and every one should visit here .
HARSH KUMAR SAINI

Yeh course cryptography aur network security ke basics samajhne ke liye bahut accha hai. Isme symmetric aur asymmetric key cryptography jaise complex topics ko bade aasaan tareeke se samjhaya gaya hai. Assignments thode challenging hain par concept clear karne mein bahut madad karte hain. Overall, cybersecurity mein career banane ke liye yeh ek best foundational course hai.
Udit Kumar

Yeh course cryptography ke mathematical concepts ko samajhne ke liye bahut badhiya hai. Prof. ne complex algorithms ko kaafi simplify karke samjhaya hai. Network security protocols aur real-world attacks ki knowledge gain karne ke liye yeh best resource hai. Assignments thode tough hain par seekhne ko bahut milta hai.
Aryan Singh

The teachers are great and the explanation is very good in this series I learned lots of thing with full explanation all the Videos are clear and perfect for view
Anshika Jindal

This is very good course and it is beginner friendly too..I understood it very well......................................
Mohamed Khaled Abdelfattah Youssef

Cryptography and Network Security is the fundamental bedrock of our modern digital world. This subject moves far beyond simple passwords, delving into the sophisticated mathematical principles that protect our data. You explore everything from ancient ciphers to modern marvels like public-key cryptography (RSA, ECC), hash functions, and digital signatures. It's challenging but incredibly rewarding, as it demystifies how secure communication, online banking, and data privacy actually work.