"Someone posing as a Ukrainian citizen just joins the chat and starts spreading misinformation, or gathers data, like the location of shelters," Tsekhanovska said, noting how false messages have urged Ukrainians to turn off their phones at a specific time of night, citing cybersafety. In the United States, Telegram's lower public profile has helped it mostly avoid high level scrutiny from Congress, but it has not gone unnoticed. Artem Kliuchnikov and his family fled Ukraine just days before the Russian invasion. I want a secure messaging app, should I use Telegram? Anastasia Vlasova/Getty Images
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