API Security Best Practices for 2025
Protect your applications with these modern security patterns, authentication flows, and rate limiting strategies.
Securing API Endpoints in Modern Applications
A comprehensive guide to implementing authentication, encryption, and rate limiting with real-world examples.
// Authentication middleware
const jwt = require('jsonwebtoken');
async function authMiddleware(req, res, next) {
const token = req.header('x-auth-token');
try {
const decoded = jwt.verify(token, process.env.JWT_SECRET);
req.user = decoded;
next();
} catch (err) {
res.status(401).json({ error: 'Unauthorized request' });
}
}Authentication Layer
Use JWT tokens authentication with signed headers and expiration policies. Our API enforces strict token validation and revocation mechanisms.
Transport Encryption
All API traffic must use TLS 1.3 with AES-256-GCM. Automatic certificate rotation and HSTS headers ensure secure transport.
Rate Limiting
We apply sliding window rate limiting with configurable per-endpoint policies. IP tracking and account-based limits protect against abuse.
Zero Trust Implementation
See how we designed industry-leading security architecture across platforms.