This book sets out to equip agile software development teams and security stakeholders with the tools needed to harden a software product. This is done by fusing the processes of agile software development with the top twenty-five software security bugs widely known to developers and security experts. Building security in and making it an integral part of the software development life cycle is very much a challenge for any software and product development team. This book shows agile teams how the barriers to security can be broken down to build security in to existing or new software products.This book will take agile teams through the process of building security into a software product. Traditional agile team roles are given new, additional security roles and responsibilities; agile will support the flexibility needed for these additional roles. The worksheets and tables provided at the end of this book serve to support scrum masters and product owners as they transition to the new, added responsibility in their organization.