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The encryption is based on 2048-bit RSA encryption, 256-bit symmetric AES encryption, and Diffie–Hellman secure key exchange. Ultimately though, using Telegram doesn’t necessarily mean your messages are more private or secure than when using WhatsApp or other messaging apps. Server-side data leaks can still happen, and no amount of encryption will help if your end device is already compromised. Pin Messages in Channels

Edit Videos Settings in Telegram Everyone (default one: Allow everyone to view your profile. Whether you no longer want to let redundant chats clutter the precious storage of your device or wish to shield your personal chats, the auto-delete timer is for you. When you set an auto-delete timer for a specific Telegram chat, all of its content including images, videos, and documents are automatically deleted after the timer expires.

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. According to the official Telegram FAQ section, You can create secret chats that use end-to-end encryption. This means only you and your chat partner can read those messages. Create APIs If you’re using Telegram with the calls, secret chats feature, which provides end-to-end encryption for your messages, You can also be locking down the app itself with a passcode, PIN, or password automatically.

Customize Telegram App Icon Owners of public groups can enable join requests via Group Info > Edit > Group Type > Who Can Send Messages > select Only Members > enable Approve New Members.