MTProto Protocol

Secure and efficient mobile protocol powering Telegram

Overview

MTProto is Telegram's proprietary protocol designed for access to a server API from mobile applications. It is optimized for reliable communication over weak mobile connections and provides strong security guarantees.

Key Features

  • High-speed transmission of large files
  • Optimized for mobile networks
  • Support for multiple data centers
  • End-to-end encryption for secret chats

Security

MTProto is designed with security as a top priority:

256-bit Symmetric AES Encryption

All data is encrypted using industry-standard AES encryption with 256-bit keys.

2048-bit RSA Encryption

Public-key cryptography ensures secure key exchange and authentication.

Diffie-Hellman Key Exchange

Secure generation of shared secrets for encrypted communication.

Learn More

For detailed technical documentation about the MTProto protocol, including implementation details and security specifications, visit our developer documentation.

View Protocol Documentation