The security of cyberspace has become increasingly important for the smooth functioning of our digitally networked society, and not just since the Ukraine war. In the battle for this terrain, attackers and defenders are engaged in a constant arms race. In the video, Prof. Dr. Katerina Mitrokotsa answers the question of whether a technology is within reach that could finally secure cyberspace. And how her research is helping to ensure that data can be processed even though it is encrypted, and how this could paradoxically increase our privacy.