• Telegram'ssource code, protocol, and API are all accessible to the public, so anyone can examine them, see how they function, and make an informed decision. Telegram uses verifiable builds, which allow experts to independently verify that the code we publish on GitHub is the same code used to create the apps you download from the App Store or Google Play.
• You don't have to when it comes to secret chats; simply make sure your secret chat's visualised key matches the one in your friend's secret chat settings. Text, media, and files are all encrypted in the same way, regardless of their type.
• you use 256-bit symmetric AES encryption, 2048-bit RSA encryption, and Diffie–Hellman secure key exchange for our encryption.

Read More: What languages does Telegram support?