Ensuring web security while implementing a payment gateway API is crucial to protecting user data and preventing fraud. Here are key steps to follow:
  1. Use HTTPS (SSL/TLS Encryption): Install an SSL/TLS certificate to enable HTTPS and encrypt all data transmitted between the user, server, and payment gateway.
  2. Implement Secure Authentication & Authorization: Use strong API keys and OAuth tokens instead of exposing credentials. Restrict API access with IP whitelisting and role-based access control (RBAC).
  3. Validate & Sanitize User Inputs: Prevent SQL injection and XSS attacks by sanitizing input data. Use prepared statements when handling database queries.
  4. Enable Web Application Firewall (WAF): Protect against DDoS attacks, brute force attacks, and other threats. Use Hostinger’s security tools (since you’re hosted there) or cloud-based WAF services.
  5. Implement Razorpay Webhooks Securely: Verify webhook signatures using Razorpay’s Webhook Secret. Process only validated events to prevent spoofing.
  6. Use Tokenization for Card Data: Avoid storing sensitive payment data. Use tokenization to replace card details with secure tokens.
  7. Enforce Strong Password Policies: Require strong passwords and enable multi-factor authentication (MFA) for admin access.
  8. Regularly Update Software & Plugins: Keep PHP, MySQL, and all plugins updated to fix security vulnerabilities.
  9. Monitor & Log Transactions: Enable real-time logging to track suspicious transactions. Use fraud detection tools to detect unusual payment activity.
  10. Comply with PCI DSS Standards: Follow PCI DSS guidelines to ensure secure payment processing. Avoid storing CVV and other sensitive payment details.