Authentication in Backend
Exploring Different Backend Authentication Techniques
What is Authentication in Backend?
Authentication in the backend is the process of verifying the identity of a user or system trying to access a service or resource. It ensures that only authorized users can log in and interact with the application.
How Authentication Works in the Backend?
A user submits login credentials (username or password or other authentication factors).
The system verifies the credentials against stored records.
If valid, the system grants access and creates a session/token.
If invalid, the system denies access.
Types of Authentication in the Backend
Session-Based Authentication (Common in multi-page web apps)
The backend creates a session for the user after login.
A session ID is stored in cookies, which is then used to identify user on subsequent requests.
Token-Based Authentication (Common in single page applications)
JWT (JSON Web Token): After login, the backend issues access token and refresh token (JWTs), sends them to your browser, and your browser includes access token in future requests to the server for verification.
OAuth: Used for third-party authentication (e.g., Google, Facebook login).
Cookie-Based Authentication
Directory-Based Authentication
- LDAP authentication
Multi-Factor Authentication (MFA)
- Requires multiple verification steps (e.g., password + OTP).
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