Telegram does offer end-to-end encrypted communications through Secret Chats, but this is not the default setting. Standard conversations use the MTProto method, enabling server-client encryption but with them stored on the server for ease-of-access. This makes using Telegram across multiple devices simple, but also means that the regular Telegram chats you’re having with folks are not as secure as you may believe. In 2018, Russia banned Telegram although it reversed the prohibition two years later. In the United States, Telegram's lower public profile has helped it mostly avoid high level scrutiny from Congress, but it has not gone unnoticed. Despite Telegram's origins, its approach to users' security has privacy advocates worried. The Russian invasion of Ukraine has been a driving force in markets for the past few weeks.
from ms
