Security has never been more important than it is today. Not only are organizations more or less constantly attacked, individuals are also under attack. To say that software is becoming the new battleground is a bit trite but absolutely true. Yet, security is too often thought of as another feature or something you can bolt on at the end or, even worse, something we should hide to avoid frightening people. In this talk, Jesper Johansson will discuss how security changes everything we do as software engineers and software implementers.