Cryptographic Systems and Network Defence Crash Course: Strategies for Ensuring Data Integrity and Securing Modern Networks

This book offers a comprehensive introduction to cryptography and cybersecurity, presenting both foundational principles and modern advancements in digital security. It begins by examining computer attacks, security threats, and essential concepts such as confidentiality, integrity, and availability. The text thoroughly explains core cryptographic techniques, including symmetric and asymmetric encryption, digital signatures, and secure key management. It explores widely used algorithms such as Data Encryption Standard (DES) and RSA, highlighting their design and practical applications. This book also discusses message authentication mechanisms and hash functions, including HMAC, to ensure data integrity and authenticity