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. READ MORE Despite Telegram's origins, its approach to users' security has privacy advocates worried. The Russian invasion of Ukraine has been a driving force in markets for the past few weeks. "The argument from Telegram is, 'You should trust us because we tell you that we're trustworthy,'" Maréchal said. "It's really in the eye of the beholder whether that's something you want to buy into."
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