Individual messages can be fully encrypted. But the user has to turn on that function. It's not automatic, as it is on Signal and WhatsApp. But because group chats and the channel features are not end-to-end encrypted, Galperin said user privacy is potentially under threat. Some privacy experts say Telegram is not secure enough "He has kind of an old-school cyber-libertarian world view where technology is there to set you free," Maréchal said. In 2018, Russia banned Telegram although it reversed the prohibition two years later.
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