Docker Content Trust: Signing and Verifying Container Images

In modern cloud-native environments, deploying unsigned or unverified container images poses a severe security risk. This text-based course guides you through the foundational concepts of container security, focusing on how to establish trust and verify image integrity before any code runs in production. You will start with the essential terminology of container security, cryptographic signing, and the role of registry authentication. By reading through clear explanations and analyzing practical configuration examples, you will learn how to configure a secure registry environment, manage cryptographic keys, and enforce signature verification in your deployment pipelines. The course also covers modern container security practices, such as integrating signature verification with Kubernetes admission controllers and managing keys securely in CI/CD environments. What you'll learn: - Understand the core principles of Docker Content Trust and the Notary framework - Configure environment variables and keys required to sign container images - Push signed images to secure registries and verify their signatures upon retrieval - Manage delegation keys and root keys securely to maintain a chain of trust - Integrate image signature verification into automated CI/CD deployment pipelines - Troubleshoot common trust verification errors and key management issues This course begins with basic security definitions and key management concepts before moving into step-by-step configuration workflows and pipeline integration. It is designed for software developers, system administrators, and DevOps beginners who want to secure their containerized applications. No previous experience with cryptographic signing is required, though a basic familiarity with running standard Docker commands is helpful. Start reading today to secure your container supply chain.