In a digital world, the hybrid attack has become a recurrent occurrence. To be prepared to fight cyber threats, the European Union (EU) had first to understand this new form of attack and how dangerous it could be. After the Estonian cyberattack of 2007, the need for a response plan able to satisfy national and European defence expectations brought the debate of cybersecurity to the centre of defence and security policies. The technological advances brought by the internet and electronic devices have become a fundamental part of our daily lives. These technological changes have transformed the way we communicate today and have directly impacted how countries handle defence and security strategies.