Atul Kahate.pdf 'link' | Cryptography And Network Security By

Introduction

Topics Covered in the Book

Key Takeaways

3. Symmetric Key Cryptography

• Overview of symmetric encryption: single key for encryption/decryption.
• Block ciphers vs. stream ciphers.
• DES (Data Encryption Standard): structure, S-boxes, weaknesses.
• AES (Advanced Encryption Standard): features, rounds, key sizes.
• Other algorithms: Blowfish, RC4, IDEA.