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Cloud access 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. To adjust the theme, go to Settings > Chat Settings on Android, or Settings > Appearance on iOS. Here you can change the text size, bubble colors, night mode settings, and similar options. Choose Chat Background to set a new wallpaper for your groups.

This kind of feature can make conversations more orderly while increasing the value of each individual message. You can enable this option from the “Group Permission” section. Keep it on forever, or toggle as necessary to throttle rush hour traffic. They offer a great opportunity to reach people directly, sending notifications to their devices with every post. Users can join and leave channels at any time. And once they join a channel, they can see its entire message history. Let’s say you have enabled the “Slow Mode” and set an interval of 1 minute. Now members in the group can only send one message per minute. A timer will show them how long they have to wait before sending the next message. With the ability to send files up to 2 GB (or 4 GB), users can easily share large media items from other apps directly to Telegram on any mobile platform. This saves both time and storage space – so you don't have to save the file before sending it in Telegram.

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The encryption is based on 2048-bit RSA encryption, 256-bit symmetric AES encryption, and Diffie–Hellman secure key exchange. Telegram may be among the most popular messaging services in the world, yet there are still many who don’t know what it’s all about. The app is often name-dropped in discussions regarding online privacy and security, but aren’t all messaging apps secure? Don’t more popular apps like WhatsApp and Facebook Messenger (despite their ties to Facebook) also have the fabled “end-to-end” encryption? What makes Telegram so special?