Building security and privacy into product development is more critical today than ever before. First introduced through the Microsoft Trustworthy Computing initiative in the early 2000s, the well-known security development lifecycle (SDL) is a framework designed to do just that. It was originally devised to enhance software security, but an SDL process can and should be applied to all types of products to help root out security and privacy vulnerabilities, while establishing long-term resilience in the rapidly evolving threat landscape.