Applied Cryptography: Principles, Analysis, and Python Implementation

This book systematically explores modern cryptography, bridging the gap between theoretical frameworks and engineering practices and transforming complex mathematical concepts into accessible, real-world algorithms. It begins with classic cryptographic systems, such as symmetric ciphers (including stream and block ciphers) and public-key cryptography (e.g., RSA and ECC).Then, it advances to specialized post-quantum topics, including lattice-based cryptography and homomorphic encryption.Unlike purely theoretical treatments, this book integrates programming examples and hands-on exercises that transform abstract mathematics into tangible, logical applications.Additionally, it addresses essential security protocols, including hash functions and digital signatures, equipping readers with a structured approach to secure system design. Designed for students, researchers, and professionals in computer science and cybersecurity, this book connects foundational theory with practical engineering