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Unlike mass-market messengers like WhatsApp and Line, Telegram is an open-source app. This means anyone can check the app’s source code, protocol, API, and see how it works and make an informed decision. The encryption is based on 2048-bit RSA encryption, 256-bit symmetric AES encryption, and Diffie–Hellman secure key exchange. 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.

Enable Auto-Night Mode Just press and hold on the message you want to change and then tap the “edit” button. From there, you can modify the message and resend it. Telegram will put an “edited” label on the message to let recipients know of the update. Edit Sent Messages Voice messages can be converted to text for those times you don't want to listen, but want to see what it says. You can rate transcriptions to help improve them.

If you don’t want messages in your secret chats to hang around forever, Telegram lets you set self-destruct timers to permanently remove them. After a message is received, it remains in the chat for a predetermined period — you can choose times between one second and one week – before disappearing. In fact, Telegram supports verifiable builds that allow outside developers to check whether the code published on GitHub is the exact same code that is used to create the app, which you have downloaded from Google Play or App Store. Custom themes Keep reading to learn what Telegram does, what its main features are, and why you might consider using it. You can also download the app right away at the link below.

Another security feature that adds usability is usernames. Instead of giving people your phone number, you can simply give them your username. This gives you better control over what information is out there, and how people can contact you in the future. 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.