Some privacy experts say Telegram is not secure enough "The result is on this photo: fiery 'greetings' to the invaders," the Security Service of Ukraine wrote alongside a photo showing several military vehicles among plumes of black smoke. Such instructions could actually endanger people — citizens receive air strike warnings via smartphone alerts. 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. Telegram Messenger Blocks Navalny Bot During Russian Election
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