Telegram data complies with local privacy laws

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This is good for privacy but can be limiting for certain apps that need more detail. 4. No Refresh Tokens or Sessions The authentication is essentially one-time, based on the timestamp (auth_date). This means you have to manage sessions on your backend, as Telegram does not issue access or refresh tokens like OAuth2 providers. Telegram Web Apps and Expanded Data Access Telegram recently launched Telegram Web Apps, which allow developers to create rich user interfaces inside Telegram chats, using JavaScript and HTML. These apps can also use the Telegram WebApp.initData property, which functions similarly to the Data Auth URL.

The initData string includes: User data (same fields as the login URL) Chat information if opened in a group Timestamp and verification hash Developers verify the initData using the bot token in the netherlands telegram data same way as with the Auth URL. This expands the possibilities for developers, enabling them to build in-app shopping carts, surveys, or dynamic content displays—all verified through Telegram’s authentication layer. Legal and Compliance Aspects Telegram's authentication flow offers some compliance advantages under GDPR and similar regulations: Data Minimization: Only basic profile data is shared, and none of it includes sensitive personal data. User Consent: Users explicitly authorize login via Telegram, and developers can provide their own consent forms. Data Integrity: Cryptographic hashing ensures that the data is authentic and tamper-proof.

Still, developers are responsible for ensuring that their usage of and that users are properly informed about how their data is being processed. Future Directions As Telegram continues to grow its ecosystem with Web Apps, e-commerce, and advanced bot features, the role of Telegram’s authentication URLs will expand as well. Telegram could potentially improve this system by introducing: Session management via access tokens Revocable permissions Support for broader OAuth-like flows Federated login options for enterprise use The current system is robust, but further standardization and integration with mainstream identity providers could make it more powerful and flexible.