Applied Cryptography

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.Applied Cryptography: Principles, Analysis, and Python Implementation 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 securing system design.Designed for students, researchers, and professionals in computer science and cybersecurity, this book connects foundational theory with practical engineering. Its accessible style also makes it a valuable resource for academic libraries, professional training programs, and individuals building secure systems in the digital age.