The Security Development Lifecycle book is available for downloading

Very recently, Microsoft has published online the foundation book describing SDL (Security Development Lifecycle).


The principles behind the SDL were born as a response to the Windows Longhorn project reset in the early 2000s. Back then, the entire project was wiped out and started from scratch due to the presence of critical vulnerabilities in various components – according to MS insiders. At the time, Microsoft had a questionable reputation with regards to security of its products. Therefore, the company made a huge investment in security improvement. SDL was created as the common approach to developing products, starting from the very bottom to top – from design to release.

The book was published in good old 2006, which can be seen as the Stone age comparing to the threats and attack vectors present nowadays. Nevertheless, it still remains a valuable source of knowledge and actions for the teams and companies that struggle with improving a security of the products. In my opinion, it is impossible to deliver a secure solution without integrating SDL principles into every chunk of the development process.

The most recent overview of SDL can be found at the dedicated Microsoft page.

The best part of it is the set of tools and instruments designed and used by MS at each of the steps of SDL – with links for downloads. It can be seen as a great reference to the spectrum of problems that SDL solves – you don’t have to replicate it to your organization in the exact way it works at MS but at least it helps understand the challenges and possible solutions.