Telegram boasts 500 million users, who share information individually and in groups in relative security. But Telegram's use as a one-way broadcast channel — which followers can join but not reply to — means content from inauthentic accounts can easily reach large, captive and eager audiences. Two days after Russia invaded Ukraine, an account on the Telegram messaging platform posing as President Volodymyr Zelenskiy urged his armed forces to surrender. Despite Telegram's origins, its approach to users' security has privacy advocates worried. I want a secure messaging app, should I use Telegram? Founder Pavel Durov says tech is meant to set you free
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