Where to find the latest version of Microsoft Security Development Lifecycle (SDL) guidance?

Microsoft's Security Development Lifecycle (SDL) is a well-known set of practices for integrating security and privacy considerations throughout the software development process. Even though the basic principles have been stable for years, it is still good to know where to find the official guidance documents.

At this writing, the latest published version is SDL Process Guidance v5.2, released in May, 2012. This version remains the most recent version of the guidelines. It covers requirements, design, implementation, verification, and release phases.

Even though new frameworks and DevSecOps tooling have evolved since, the SDL 5.2 remains relevant. It still captures the mindset that secure software development requires repeatable processes, not just technology.