The rapid digital transformation of the healthcare sector has brought unprecedented opportunities to enhance patient care, streamline transactions, and enable seamless data exchange across medical institutions. However, this shift has also exposed healthcare systems to significant cybersecurity risks, ranging from data breaches and ransomware attacks to sophisticated adversarial threats. Protecting sensitive patient information while ensuring the integrity and availability of healthcare transactions has therefore become a global priority. This book, AI-Enhanced Cloud Security for Healthcare Transactions, addresses this pressing need by exploring how artificial intelligence (AI) and machine learning (ML) can strengthen cloud-based healthcare infrastructures.