Authentication Tokens

Authentication tokens are digital credentials used to verify a user's identity in web and application security. They are typically generated by a server after successful login and passed between client and server to authorize subsequent requests without re-entering credentials. Common types include JSON Web Tokens (JWT), OAuth tokens, and session tokens.

Also known as: Auth Tokens, Access Tokens, Bearer Tokens, JWT, OAuth Tokens

Why learn Authentication Tokens?

Developers should learn authentication tokens to implement secure user authentication and authorization in applications, especially for stateless APIs, single sign-on (SSO) systems, and mobile apps. They are essential for maintaining user sessions efficiently, reducing server load by avoiding repeated database lookups, and enabling cross-domain authentication in modern web architectures.

Learning Resources

• docs: JWT Introduction
• tutorial: OAuth 2.0 and OpenID Connect
• video: Authentication Tokens Explained
• docs: MDN Web Docs: HTTP Authentication