Authentication
Learn how authentication works in modern applications, websites, APIs, and secure login systems.
What is Authentication?
Authentication is the process of verifying the identity of a user, device, or application before granting access to a system.
It ensures that only authorized users can access protected data, applications, dashboards, or APIs.
Why Authentication Matters
Authentication helps protect sensitive information and prevents unauthorized access to systems and applications.
Modern websites and applications use authentication systems such as passwords, OTP verification, JWT tokens, OAuth login, and multi-factor authentication.
Common Authentication Methods
- Email and Password Login
- One-Time Password (OTP)
- JWT Authentication
- OAuth Login
- Biometric Authentication
- Two-Factor Authentication (2FA)
Authentication in Web Development
In frontend frameworks like Vue.js or React, users submit login credentials through forms.
The backend validates the credentials and returns secure access tokens or sessions.
Example
A Laravel backend API validates a user’s email and password, then returns a JWT token for authenticated requests.
Frontend Login
Login forms created using Vue.js, React, or HTML.
Backend Validation
Secure credential verification using Laravel or PHP.
JWT Security
Token-based authentication for APIs and mobile apps.
Related Terms
Build Secure Applications
Learn authentication, APIs, backend security, and modern web development technologies.
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