Create a Telegram Bot via BotFather and obtain

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Telegram ID first_name: The user's first name last_name: The user's last name (if available) username: The Telegram handle (if set) photo_url: The profile picture URL auth_date: The date and time when the authentication occurred hash: A cryptographic hash that verifies the authenticity of the data The critical piece here is the hash. It acts as a signature that proves the user data was generated by Telegram and not tampered with. To verify the hash, developers use a secret token associated with their Telegram bot (using the Bot API). By reconstructing the data string and hashing it using HMAC with SHA-256, they can compare their result to the hash Telegram sent. If it matches, the user is authenticated. This model is stateless, efficient, and privacy-preserving. It gives the developer only enough data to identify the user and interact with them on Telegram, but no access to sensitive credentials or location data.

Steps to Implement Telegram Login via Data Auth URL From a developer’s perspective, implementing Telegram authentication involves several straightforward steps: the bot token. Add a Telegram mexico telegram data Login Widget or Auth URL to your website. When the user clicks "Login with Telegram," they are redirected to Telegram to authorize. Telegram sends back signed data to your specified redirect URL. On your server, use the bot token to verify the hash Telegram sent. Once verified, the user is authenticated and can be granted access to the web app or service. The entire process avoids direct password handling, complies with Telegram's API standards, and offers a streamlined experience for users who already trust and use Telegram. Advantages of Telegram’s Data Auth System The Telegram Data Auth URL approach has multiple advantages.

Passwordless Authentication The user does not need to remember or enter a password. They authenticate through Telegram, which simplifies the login flow and reduces friction. 2. Increased Security No passwords are transmitted or stored on third-party services. Telegram handles the authentication, and developers verify data authenticity using secure hashes. 3. Integration with Telegram Ecosystem Telegram's authentication system ties users directly to their Telegram accounts, making it ideal for bots, communities, or platforms that already interact with Telegram users. 4. Privacy-Friendly The data Telegram provides is minimal: basic account identifiers and public profile information. This limits potential misuse while still offering identity verification.