Messages are not fully encrypted by default. That means the company could, in theory, access the content of the messages, or be forced to hand over the data at the request of a government. I want a secure messaging app, should I use Telegram? Such instructions could actually endanger people — citizens receive air strike warnings via smartphone alerts. False news often spreads via public groups, or chats, with potentially fatal effects. In 2018, Russia banned Telegram although it reversed the prohibition two years later.
from ms