This is a comprehensive guide that explores the principles, methodologies, and applications of cryptographic security within the U.S. Department of Defence (DoD). This book provides a structured approach to understanding encryption, network security, public key infrastructure (PKI), and quantum cryptography, bridging the gap between academic theory and real-world defence applications.

The book covers historical cryptographic methods, modern encryption standards, network hardening techniques, and strategies for securing data in transit. Readers will gain insight into secure...