It is a small discreet, but strategic revolution, engaged at the top of the state. At the request of Prime Minister François Bayrou, a circular issued on July 25, 2025 now requires the exclusive use of TCHAP, the instant messaging developed under the aegis of the interdepartmental digital management, in place of American or Russian giants (Whatsapp, Telegram, Signal, etc.), for all professional communications of public officials.
But what is Cchap?
Launched in 2018, with the contribution of the ANSSI, the Ministry of Foreign Affairs and the Ministry of the Armed Forces, Tchap is in line with the telegraph Chappe, whose name it bears in tribute to the pioneer of secure communication. Its objective: to allow instant exchanges, sharing of documents and collaborative organization between its 300,000 regular users (agents, hospitals and universities), all backed by end -to -end encryption and strict access control (reserved for holders of an institutional email address).
Behind this decision, the desire displayed is not new: the government wants to regain control of the security of government communications, far from foreign applications, in a context of accentuated cyber risks. With data now accommodated on servers from the Ministry of the Interior, the government intends to guarantee the “total confidentiality“And a”public control”Professional exchanges between public service agents.
Limit risks
The obligation to adopt TCHAP does not make you forget the problems encountered by the tool at its beginnings: when it was launched in 2019, a security flaw allowed a surfer to register without government email. The flaw, then quickly clogged, had served as a lesson, encouraging continuous strengthening the security system and access management. Because if the platform collects all the government’s ambitions, it is not supposed to be accessible to the general public, but rather wants to be limited to the various public services.
This turn does not exclude the momentary coexistence of other solutions: Olvid messaging, acclaimed under the terminal era for its safety, remains tolerated in certain firms, but Tchap will be necessary for any communication with official administrations. The measure may seem binding for daily uses, but it testifies above all to a context of increasing insecurity: hacking of elected telegram accounts, data disclosure and multiplication of attacks against administrations have convinced the executive to go further.
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