RFC 6749 (OAuth 2.0)

RFC 6749, also known as OAuth 2.0, is a protocol that enables secure authorized access to third-party applications without sharing user passwords. It allows a user to grant a program access to certain parts of their account (like files or data) on another service, using limited tokens rather than revealing login credentials. This ensures privacy and security, as users can control what the application can do, and tokens can be specific, temporary, or revocable. OAuth 2.0 is widely used for secure, delegated access across web and mobile services, streamlining user authentication and authorization processes.