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. READ MORE Anastasia Vlasova/Getty Images The Russian invasion of Ukraine has been a driving force in markets for the past few weeks. Founder Pavel Durov says tech is meant to set you free
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