🛡️ Security

1. Securing Firebase Authentication

• Enable Multi-Factor Authentication (MFA): Add an extra layer of security by requiring a second factor (e.g., SMS or authenticator app).

• Enforce Strong Passwords: Ensure users set strong passwords in Firebase Authentication settings.

• Role-Based Access Control (RBAC): Use Firestore rules to limit data access based on user roles.

  Example Firestore Rules:

  rules_version = '2'; 
  service cloud.firestore {
  match /databases/{database}/documents {
     match /users/{userId} {
        allow read, update: if request.auth != null && request.auth.uid == userId;
        allow create: if request.auth != null && request.resource.data.keys().hasOnly(['trialCount']);
        allow write, delete: if false;
     }
  }
  }

2. Securing Stripe Integration

• Store API Keys Securely: Use Flutter Secure Storage for your Stripe API keys and tokens.
• Server-Side Purchase Verification: Always verify payments server-side to prevent fraud.
• Move Sensitive API Calls to Firebase Cloud Functions: Handle sensitive API calls (e.g., payment processing) on the backend to protect API keys from exposure.

3. Mobile Security Best Practices (Android & iOS)

• Obfuscate Code: Use ProGuard (Android) and Swift obfuscation (iOS) to protect your source code.
• Secure API Calls: Ensure all API calls use HTTPS and validate SSL certificates to prevent man-in-the-middle attacks.
• Store Sensitive Data Securely: Use Keychain (iOS) or EncryptedSharedPreferences/Android Keystore (Android) for storing sensitive data.

4. Handling User Data Securely

• Minimize Data Collection: Only collect essential data and comply with regulations like GDPR.
• Use Secure Communication: Ensure all data transfers are encrypted with HTTPS.

5. Testing Security

• Use Firebase Emulator: Test Firebase Authentication and Firestore locally before going live.
• Perform Vulnerability Scans: Use tools like OWASP ZAP or Burp Suite to scan your app for vulnerabilities.
• Test Permissions on Real Devices: Always test your app on real devices to ensure data security settings are enforced correctly.