Lecture 24 | Digital Signature - Information Security

Welcome to the Information Security Lecture Series. This playlist is designed to help students understand the fundamental concepts of Information Security and Cryptography in a simple, clear, and exam-focused manner. In this lecture series, we cover the following topics step-by-step: Introduction to Information Security • Information Security Services • Types of Security Attacks Encryption Techniques Two Major Types: • Substitution Techniques • Transposition Techniques Substitution Ciphers 1. Monoalphabetic Ciphers Additive Cipher Multiplicative Cipher Affine Cipher 2. Polyalphabetic Ciphers Playfair Cipher Vigenère Cipher Transposition Ciphers • Rail Fence Cipher • Row Transformation Cipher • Keyed Transposition Cipher Modern Encryption Algorithms • Simplified DES (S-DES) • Data Encryption Standard (DES) • Advanced Encryption Standard (AES) Mathematical Foundation • Modular Arithmetic Asymmetric Key Cryptography • Diffie-Hellman Key Exchange Algorithm • RSA Algorithm Hash Functions • SHA-1 Algorithm • Uses of Hash Functions Authentication & Digital Signatures • Digital Signature Email Security • Pretty Good Privacy (PGP) Each lecture is explained in a detailed, easy, and student-friendly format so you can quickly understand the concepts. ⸻ 📚 Lecture Notes & Tables 📖 Pre-Mids Notes: https://drive.google.com/file/d/10VnU... 📖 Post-Mids Notes: https://drive.google.com/file/d/18cmp... 📖 Complete Notes Of Information Security: https://drive.google.com/file/d/1_YyY... 📄 Cipher Tables: https://drive.google.com/file/d/11zJF... May Allah make this knowledge beneficial for everyone. Ameen.