Why Security Matters
With increasing cyber threats, developers must prioritize security from the start.
Best Practices
1. Input Validation
// Never trust user input
const sanitize = (input) => {
return input.replace(/<[^>]*>/g, "");
};2. Authentication
- Use JWT with short expiry
- Implement refresh tokens
- Enable MFA where possible
3. Database Security
// Use parameterized queries
const query = "SELECT * FROM users WHERE id = ?";
db.query(query, [userId]);4. HTTPS Everywhere
Always use TLS encryption for data in transit.
5. Rate Limiting
const rateLimit = require("express-rate-limit");
app.use(rateLimit({
windowMs: 15 * 60 * 1000,
max: 100
}));6. Dependency Scanning
Regularly audit your dependencies for vulnerabilities.
7. Error Handling
Never expose internal errors to users.
8. Logging
Log security events for monitoring.
9. Backup Strategy
Implement automated backups with encryption.
10. Security Training
Keep your team updated on latest threats.