I want a secure messaging app, should I use Telegram? Groups are also not fully encrypted, end-to-end. This includes private groups. Private groups cannot be seen by other Telegram users, but Telegram itself can see the groups and all of the communications that you have in them. All of the same risks and warnings about channels can be applied to groups. Although some channels have been removed, the curation process is considered opaque and insufficient by analysts. The Russian invasion of Ukraine has been a driving force in markets for the past few weeks. But because group chats and the channel features are not end-to-end encrypted, Galperin said user privacy is potentially under threat.
from ru