Implementing Secure JWT Authentication in Node.js

Secure user sessions form the base of digital systems. Standard local storage tokens are vulnerable to XSS. We outline implementing a secure double-token JWT authentication setup.

1. Access Tokens vs Refresh Tokens

Never issue single, long-lived authentication keys. Instead, use short access tokens (expiring in 15 minutes) for API calls, and long refresh tokens (expiring in 7 days) stored securely to regenerate them.

2. Enforcing Secure Cookie Cookies

Store refresh tokens inside HttpOnly, SameSite=Strict, Secure cookies. This browser state prevents client javascript from reading the keys, blocking common session hijacking methods.

3. Token Revocation lists

To secure systems when users log out, set up a Redis blacklist store. Match incoming tokens against the database revocation blacklist to block unauthorized access instantly.

• Never include sensitive user details in JWT payloads
• Sign JWT tokens using strong private secret keys
• Rotate secret keys periodically to limit exposure risks