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The encryption is based on 2048-bit RSA encryption, 256-bit symmetric AES encryption, and Diffie–Hellman secure key exchange. There's also a hidden menu that appears when you long-press on the Send button. Choose Schedule message to delay sending until a time in the future. You can also tap Send When Online to send the message when the other person is next active on Telegram. Hide Telegram Profile Photo

When you turn on that feature, the app automatically switches to dark mode. Go to Settings > Chat Settings and toggle on Auto-Night Mode. Another useful feature is “send without sound”. It is rather self-explanatory: you can message friends freely when you know they are attending an important meeting, studying, or sleeping. Recipients will get a notification as usual, but their device won’t make sound, even if it is in general mode. My Contacts: Allow only your contacts to view your profile. Next, tap Never Share With and then select the people from whom you want to hide your profile.

While all Telegram chats are client-server encrypted, default chats are still stored on Telegram's servers. This conveniently allows you to access your messages on multiple devices, but it might raise privacy concerns. You don’t have to start from scratch to make Telegram apps. TDLib (Telegram Database Library) makes it easy to develop feature-rich and secure apps. It takes care of local data storage, network implementation details, and encryption so that you can focus on design and interfaces. Share Live Locations Chat Folders

Save Messages You Want to Access Anywhere First and foremost, Telegram’s headline feature is privacy, and to ensure this it employs end-to-end encryption. This is what stops those outside a two-way conversation — be it a company, the government, hackers, or someone else — from seeing what has been sent.