**Source : Help Net Security | 9 juin 2026**

French authorities are investigating a compromise of Tchap, the government’s secure messaging platform, after hackers hijacked a user account and gained access to public chat rooms. Tchap is the French government’s messaging platform for civil servants, ministries, and public agencies. Built on the open-source Matrix protocol, it was developed to keep government communications on infra...

👉 **Lire l'article complet sur Help Net Security :** [https://www.helpnetsecurity.com/2026/06/09/tchap-french-government-secure-messaging-platform-breach/](https://www.helpnetsecurity.com/2026/06/09/tchap-french-government-secure-messaging-platform-breach/)