Authentication

OAuth 2.0 is an authorization framework standardized as RFC 6749 by the IETF (Internet Engineering Task Force) in 2012. It allows users to grant third-party applications limited access to their resources without exposing their credentials (passwords). It is now widely used for social login and API authorization across major services such as Google, Facebook, GitHub, and Twitter. The Origins of OAuth The Problem OAuth Solves Before OAuth, users had to directly provide their usernames and passwords to third-party applications, which created serious security risks. Users had no way to know which applications would safely manage their credentials, nor could they granularly control access permissions or revoke them at any time. ...

Web authentication solves a basic problem created by HTTP’s stateless nature: how a server can recognize the same user across multiple requests. Since Lou Montulli of Netscape Communications invented cookies in 1994, authentication has evolved from session-based approaches to token-based ones. Modern web applications widely use hybrid methods that combine JWT and Refresh Tokens to meet both security and scalability requirements. Understanding Authentication and Authorization The Difference Between Authentication and Authorization ...