Cybersecurity is no longer a problem of tools alone, but of intelligence architecture. As artificial intelligence advances, the challenge shifts from detection and response toward the design of systems capable of autonomous reasoning, coordination, and adaptation under uncertainty.This book presents a forward-looking framework for cybersecurity built on diffused intelligence―a model in which human expertise and AI-driven automation operate as an integrated system rather than as isolated components. Moving beyond incremental approaches, it introduces a Transformers-based, AI-driven architectural paradigm for autonomous cyber defense, where decision-making is distributed, contextual, and continuously evolving.By unifying concepts from cybersecurity, artificial intelligence, and complex systems, the work advances a practical and conceptual foundation for the next generation of security operations. It demonstrates how large-scale models and intelligent agents can be orchestrated to create resilient, adaptive defense ecosystems.This volume is intended for researchers, AI engineers, and advanced practitioners in cybersecurity and machine intelligence, particularly those engaged in building and operating intelligent systems at scale. Read more