Telegram Cloud is just like a chat, where you can save almost all common file types (such as text messages, images, links, audio and video notes, locations, contacts, and links) as long as they are not bigger than 1.5 GB. Telegram allows edit, unsend sent messages even for the other people on the same chat. It allows to unsend messages shared with the first 48 hours after sending. The platform supports two types of channels: public and private. The former can be found in search, and anyone can join them, whereas the latter can be joined only via invitation links.
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Pin Messages in Channels Improved Login Flow Telegram supports two layers of secure encryption. Cloud Chats use server-client encryption while Secret Chats use an additional layer of client-client encryption. All content is encrypted in the same way — be it media, text, or files. Save for Notifications
Perhaps the most important and the best feature of the Telegram app is its security. It is based on the MTProto protocol that is built upon time-tested algorithms. It enables high-speed, reliable message delivery on weak connections. To lock a chat go to Settings->Privacy and Security->Passcode Lock and enable it. Once you create a passcode and enable it, you will be able to lock and unlock your chats by tapping on the lock icon at the top right of the app.
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