Secrets & Key Management in the Cloud: KMS, HSMs, and Vault Patterns explores the complex architecture, technologies, and governance frameworks that protect cryptographic assets in modern cloud ecosystems. The book examines how encryption keys, secrets, and credentials are generated, stored, rotated, and destroyed across distributed infrastructures, combining technical depth with practical insights into real-world implementations. From hardware security modules and key management services to vault automation, zero trust architectures, and AI-driven anomaly detection, it offers a comprehensive journey through the evolving landscape of cloud cryptography. Designed for security architects, engineers, and compliance professionals, it provides a deep understanding of how to orchestrate trust, ensure compliance, and maintain resilience in an increasingly decentralized digital world.