- ⓘ Always validate and sanitize user inputs to prevent injection attacks like XSS and SQL injection.
- ⓘ Implement strong authentication mechanisms and verify user permissions for every action.
- ⓘ Use secure, randomly generated session IDs and set appropriate timeouts and secure flags (HttpOnly, Secure).
- ⓘ Encrypt sensitive data both in transit (e.g., HTTPS) and at rest.
- ⓘ Handle errors gracefully without revealing sensitive information. Log security-relevant events.
- ⓘ Keep all libraries and frameworks up-to-date to patch known vulnerabilities.
- ⓘ Ensure server and application configurations are hardened, disabling unnecessary services and features.
- ⓘ Implement CSRF tokens for all state-changing requests.
- ⓘ Implement security headers like CSP, HSTS, X-Content-Type-Options, etc.
- ⓘ Conduct periodic security reviews, penetration testing, and code audits.