From the very early start of mankind, security has been an important and valued necessity. Securing and transporting information has historically evolved primarily due to wars, in recent decades also due to financial and political reasons. Security nowadays has many faces and will continue to be an ongoing battle between the good and the bad. Lack of security can have fatal consequences for health, society, and stability. Alan Turing's achievements during World War II founded the basis for modern IT security in many ways and since then it has become just as (or even more) important than plain functionality. How will future attacks appear, and how do we fight this challenge? How will quantum computing change the rules of digital security? How do we avoid that security constrains us and our systems?