Le gouvernement avait généralisé en septembre 2025 l'utilisation de Tchap pour l'ensemble des agents publics.
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Tchap, the secure messaging platform for public agents, victim of a cyberattack
francecyberattacktchapgovernment-communicationssecurity-breach
Tchap, the secure messaging platform used by French public agents, has been the victim of a cyberattack. The platform was generalized for use by all public agents in September 2025. The attack's impact on the security of government communications is currently being assessed.