Set Telegram Pass code in Telegram features Telegram lacks the Stories feature of some competing messaging apps which lets you post images or short videos without messaging a contact directly. Admittedly it isn’t an essential feature for most people. To lock your messages, go to “Settings”, “Privacy and Security” and tap on “Passcode Lock”. You will be asked to set a four-digit passcode and confirm it. Once you do that, you will find additional options to “unlock the app with fingerprint” and “auto-lock” it after a specific duration.
A further privacy blunder is that Telegram notifies your contacts when you join it — unless you don’t give it permission to access your contacts. The app doesn’t warn you it’s about to ping your contacts, and that’s a big caveat for those who want to use Telegram to keep a low profile. Hide Your ‘Last Seen’ From Certain Users Premium Chat Management Turn on Secret Chat
Next, tap Never Share With and then select the people from whom you want to hide your profile. Cloud access Since an update in 2019, Telegram has allowed users to delete messages sent by other users, across all devices. It’s a somewhat divisive feature. Having your messages deleted by someone else doesn’t feel very good. But if your conversation is between you and a person you trust, it’s another handy way to control your online communications. The encryption is based on 2048-bit RSA encryption, 256-bit symmetric AES encryption, and Diffie–Hellman secure key exchange.
Launch the Telegram app on your iPhone or Android device -> navigate to the Settings and choose Devices. System Default (Android) or System (iOS): Matches the theme to your operating system's current mode.
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