"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. Some privacy experts say Telegram is not secure enough I want a secure messaging app, should I use Telegram? Artem Kliuchnikov and his family fled Ukraine just days before the Russian invasion. Anastasia Vlasova/Getty Images
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