Such instructions could actually endanger people — citizens receive air strike warnings via smartphone alerts. In 2018, Russia banned Telegram although it reversed the prohibition two years later. But because group chats and the channel features are not end-to-end encrypted, Galperin said user privacy is potentially under threat. "We as Ukrainians believe that the truth is on our side, whether it's truth that you're proclaiming about the war and everything else, why would you want to hide it?," he said. What distinguishes the app from competitors is its use of what's known as channels: Public or private feeds of photos and videos that can be set up by one person or an organization. The channels have become popular with on-the-ground journalists, aid workers and Ukrainian President Volodymyr Zelenskyy, who broadcasts on a Telegram channel. The channels can be followed by an unlimited number of people. Unlike Facebook, Twitter and other popular social networks, there is no advertising on Telegram and the flow of information is not driven by an algorithm.
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