[Cyberattack at Dax hospital: Presentation of the facts, consequences and feedback]

Cybersecurity is a major issue in today's world. Health structures are not immune to attacks aimed at stealing valuable sensitive data, demanding a ransom, disrupting or paralyzing a system for political purposes. The Dax Hospital Center (France) had to deal with such an attack in February 2021, bringing the entire computer system to its knees. Radiotherapy, a highly technological specialty and dependent on computers, is a very sensitive sector: unlike other specialties, computer malfunctions prevent any treatment of patients. Faced with this threat which is a reality and of which we bring here a testimony based on our experience, it is important to reflect on the human and technological means in cooperation with the IT specialists to reduce this risk as much as possible but also to be able in the event of an attack to reconstruct the system as quickly as possible and ensure continuity of care.