Cryptography & Network Security

Introduction to Cryptography and Network Security

CIA Triad

The OSI Security Architecture

Security Attacks

Security Services

Security Mechanisms

Network Security Model

Cryptography

Cryptography – Key Terms

Cryptanalysis

Brute Force Attack

Classical Encryption Techniques

Caesar Cipher (Part 1)

Caesar Cipher (Part 2)

Monoalphabetic Cipher

Playfair Cipher (Part 1)

Playfair Cipher (Part 2)

Playfair Cipher (Solved Question)

Hill Cipher (Encryption)

Hill Cipher (Decryption)

Polyalphabetic Cipher (Vigenère Cipher)

Polyalphabetic Cipher (Vernam Cipher)

One Time Pad

Rail Fence Technique

Row Column Transposition Ciphering Technique

Steganography

LSB Steganography - Demo

Cryptography (Solved Questions)

Abstract Algebra and Number Theory

Prime Numbers in Cryptography

Modular Arithmetic (Part 1)

Modular Arithmetic (Part 2)

Modular Exponentiation (Part 1)

Modular Exponentiation (Part 2)

GCD - Euclidean Algorithm (Method 1)

GCD - Euclidean Algorithm (Method 2)

Relatively Prime (Co-Prime) Numbers

Euler’s Totient Function (Phi Function)

Euler’s Totient Function (Solved Examples)

Fermat's Little Theorem

Euler's Theorem

Primitive Roots

Multiplicative Inverse

Extended Euclidean Algorithm (Solved Example 1)

Extended Euclidean Algorithm (Solved Example 2)

Extended Euclidean Algorithm (Solved Example 3)

The Chinese Remainder Theorem (Solved Example 1)

The Chinese Remainder Theorem (Solved Example 2)

The Discrete Logarithm Problem

The Discrete Logarithm Problem (Solved Example)

Prime Factorization (Fermat's Factoring Method)

Testing for Primality (Fermat's Test)

Testing for Primality (Miller-Rabin Test)

Group and Abelian Group

Cyclic Group

Rings, Fields and Finite Fields

Stream Cipher vs. Block Cipher

Feistel Cipher Structure

Introduction to Data Encryption Standard (DES)

Single Round of DES Algorithm

The F Function of DES (Mangler Function)

Key Scheduling and Decryption in DES

Avalanche Effect and the Strength of DES

Data Encryption Standard (DES) - Solved Questions

Introduction to Advanced Encryption Standard (AES)

AES Encryption and Decryption

AES Round Transformation

AES Key Expansion

AES Security and Implementation Aspects

Multiple Encryption and Triple DES

Block Cipher Modes of Operation

Electronic Codebook (ECB)

Cipher Block Chaining (CBC)

Cipher Feedback (CFB)

Output Feedback (OFB)

Counter Mode (CTR)

Block Cipher Modes of Operation (Solved Question)

Pseudorandom Number Generator (PRNG)

Golomb’s Randomness Postulates

Public Key Cryptography | Chapter-4 | Cryptography & Network Security | nesoacademy.org

Hash Functions & Digital Signatures | Chapter-5 | Cryptography & Network Security | nesoacademy.org

System Practices & System Security | Chapter-6 | Cryptography & Network Security | nesoacademy.org

Web, Email, & IP Security | Chapter-7 | Cryptography & Network Security | nesoacademy.org