Chapter 1 Intertwined Concept of Cyber Security, Digital Forensics & National Security Chapter 2 Cyber Security, Forensic Tools & Risk Mitigation Techniques Chapter 3 Securing Digital Documents: Advanced Cyber Security and Forensics Techniques for Data Protection Chapter 4 Cyber Security and Forensic Facet of Border Security Chapter 5 CYBERSECURITY AND FORENSICS IN BANKING SYSTEMS AND FINANCIAL INSTITUTIONS Chapter 6: Cyber Security and Digital Forensics of Vital Installations and Critical Infrastructure Chapter 7 Cryptanalysis Techniques for National Security Chapter 8 Drone Technology and Digital Forensics Chapter 9 Cyber Security and Forensics for Sustainable Energy Security Chapter 10 Cyber Security & Forensics in Transportation Security Chapter 11 CYBER SECURITY & FORENSICS FOR FREE & FAIR ELECTIONS Chapter 12 Cyber Security & Forensics for Migration & Citizenship Issues Chapter 13 Cyber Security & Forensics for Multimedia Investigation Chapter 14 GLOBAL SECURITY AGENCIES AND CYBER WAR FORCES Chapter 15 Security Testing: Cyber Incident and Vulnerability, Mitigations and Forensics Chapter-16 Major Global Digital Policy Frameworks Chapter-17 Enhancing Log File Analysis in Digital Forensics and Incident Response through Machine Learning Chapter-18 Ethics and Professional Standards of Cyber Security, Digital Forensics & National Security CHAPTER-19 EVIDENCE PRESENTATION, REAL-WORLD CASE STUDIES, AND COURTROOM TESTIMONY IN CYBERSECURITY CASES Chapter-20 Efficient Data Visualization for Cyber Security using Multi-Objective Genetic Optimized Adaptive XGBOOST