The gold standard of encryption, known as end-to-end encryption, where only the sender and person who receives the message are able to see it, is available on Telegram only when the Secret Chat function is enabled. Voice and video calls are also completely encrypted. I want a secure messaging app, should I use Telegram? Anastasia Vlasova/Getty Images Such instructions could actually endanger people — citizens receive air strike warnings via smartphone alerts. 'Wild West'
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