Authentication confirms who you are, while Security protects what you have. Together, they ensure safe access to systems, data protection, and trustworthy web interactions.
Helps verify user identity and ensures that access is granted only to legitimate users.
Protects your data and system resources from unauthorized access and breaches.
This section helps you implement key authentication and security practices in your web applications. Click on any card below to explore trusted articles, tools, and documentation on each topic — from verifying identities to securing sessions and data.
📎 Click on the cards below to explore detailed articles and documentation for each topic.
Firebase Authentication is a secure and easy-to-use identity solution that supports email/password, phone numbers, and third-party providers like Google, Facebook, and Twitter. It simplifies backend authentication and works well with Firebase Realtime Database or Firestore for protected access.
Building a secure authentication system doesn’t have to be hard. Here’s a recommended approach using Firebase:
JSON (JavaScript Object Notation) is the format behind JWTs (JSON Web Tokens) — lightweight tokens used to securely transmit information between parties. They’re compact, self-contained, and widely used in modern auth systems.
To maintain a secure environment, follow these recommended best practices when handling user authentication and sensitive data.
Enforce complexity rules and password length. Encourage the use of password managers.
Add a second layer of verification using email, OTP, or apps like Google Authenticator.
Never store plain text passwords.
Use hashing algorithms like bcrypt or Argon2.
Limit login attempts, use CAPTCHA, and monitor login activity to detect abuse.
Ensure all data is encrypted during transmission using SSL/TLS certificates.
🔥 Firebase Authentication Full Guide
📧 Email/Password Auth Setup
🔐 Google Auth with Firebase (React.js Example)
🔐 Google Auth with Firebase (React.js Example)
📚 Quick, modern, and developer-friendly Firebase Auth course.
Dive into Firebase Authentication – learn how it works, what methods are supported, and how to set up your app securely.
Classic method where users register using their email and a secure password. Easy to implement with Firebase.
Learn MoreLet users sign in
with their Google account securely. Firebase handles OAuth2 authentication seamlessly.
Send OTP to
users' phone numbers and verify them without a password. Useful in mobile-first apps.
Track user's sign-in/out state in real time and update your UI accordingly with Firebase Auth listener.
Learn MoreExplore how Firebase Authentication is used across real-world apps to streamline secure login, manage users, and protect sensitive data.
Used for secure login, OTP verification during checkout, and role-based access for users/admins.
Explore DocsUsed in online learning platforms to authenticate students, track sessions, and manage content access.
Learn MoreUsed for managing user health profiles, securely syncing data, and controlling data access with security rules.
Firebase Auth GuideUsed to handle user identities, allow Google sign-ins, and protect chats using Firebase security rules.
See ExamplePhone authentication is commonly used here for secure login and transaction validation.
Read MoreEnables teams to manage accounts, collaborate securely, and control permissions for multiple roles.
Custom Auth