Guerrilla Telegram will hide dangerous chats, clean the cache and cover all traces in case of danger

During registration, Telegram requires a phone number and links your account to it; chat data is stored on the server; end-to-end encryption is not enabled by default; there is no end-to-end encryption for groups larger than two people; the software code is only partially open; Telegram requires access to your contact list; Telegram assigns users a Telegram ID during registration, and no matter what you do, your footprint will remain forever in the chats and channels you participated in.