This document outlines the security measures implemented in the JG Engine platform and guidelines for maintaining security.

All user inputs are validated and sanitized:

• Title & Description: Limited to 100 and 500 characters respectively
• Content Filtering: Automatic detection of spam, profanity, and suspicious patterns
• Schema Validation: Using Zod for type-safe request validation
• SQL Injection Prevention: Using Supabase's parameterized queries

API endpoints are protected with rate limiting:

• Builds: 5 per hour per user
• Game Creation: 10 per hour per user
• Comments: 30 per hour per user
• Reports: 5 per hour per user
• General API: 100 requests per minute per user

• Supabase Auth: Secure authentication with email/password and OAuth
• Row Level Security (RLS): Database-level access control
• Ownership Verification: All operations verify user ownership before execution
• Protected Routes: Middleware ensures authentication on protected pages

The following security headers are automatically added to all responses:

• Strict-Transport-Security: Enforces HTTPS
• X-Frame-Options: Prevents clickjacking
• X-Content-Type-Options: Prevents MIME sniffing
• X-XSS-Protection: Browser XSS protection
• Referrer-Policy: Controls referrer information
• Permissions-Policy: Restricts browser features

• Environment Variables: Validated and type-checked
• Sensitive Data: API keys and secrets stored in environment variables only
• Error Messages: Sanitized to prevent information leakage
• Request Size Limits: Maximum 500KB per API request

• Content Filtering: Automatic detection of:
  • Blocked words and phrases
  • URLs and email addresses
  • Phone numbers
  • Excessive capitalization
  • Spam patterns
• Text Sanitization: Removal of control characters
• Length Limits: Enforced on all user-generated content

1. Never commit secrets: Always use environment variables
2. Validate all inputs: Use Zod schemas for validation
3. Sanitize outputs: Prevent XSS by sanitizing data before rendering
4. Use parameterized queries: Prevent SQL injection
5. Implement rate limiting: Protect endpoints from abuse
6. Log security events: Monitor suspicious activity

1. Use HTTPS: Always serve the application over HTTPS
2. Rotate secrets: Regularly rotate API keys and secrets
3. Monitor logs: Set up alerting for unusual activity
4. Keep dependencies updated: Regularly update npm packages
5. Use environment-specific configs: Separate dev/prod configurations
6. Enable Supabase RLS: Ensure Row Level Security is active

Required environment variables are validated on startup:

// Required
NEXT_PUBLIC_SUPABASE_URL
NEXT_PUBLIC_SUPABASE_ANON_KEY
SUPABASE_SERVICE_ROLE_KEY
NEXT_PUBLIC_SITE_URL

// Optional (feature-dependent)
OPENAI_API_KEY
BUILD_SERVICE_URL
BUILD_SERVICE_SECRET
STRIPE_SECRET_KEY
STRIPE_WEBHOOK_SECRET

If you discover a security vulnerability, please email security@yourdomain.com instead of opening a public issue.

Before deploying to production:

• All environment variables are set correctly
• HTTPS is enabled
• Rate limiting is configured
• Supabase RLS policies are active
• Error messages don't leak sensitive information
• Content filtering is enabled
• Security headers are configured
• Dependencies are up to date
• Build service authentication is configured
• Stripe webhook signature verification is enabled

1. In-Memory Rate Limiting: Current rate limiting uses in-memory storage. For production with multiple instances, use Redis or a similar distributed cache.

2. Basic Content Filter: The content filter is basic. For production, integrate with a professional service like:

   • AWS Comprehend
   • Google Cloud Natural Language API
   • WebPurify

3. No DDoS Protection: Implement CloudFlare or AWS Shield for DDoS protection in production.

• Implement Redis-based rate limiting for distributed deployments
• Add CAPTCHA for public endpoints
• Integrate professional content moderation API
• Add IP-based rate limiting
• Implement audit logging
• Add automated security scanning in CI/CD
• Set up Web Application Firewall (WAF)
• Implement Content Security Policy (CSP) headers

This application follows security best practices as outlined by:

• OWASP Top 10
• OWASP API Security Top 10
• CWE/SANS Top 25

• OWASP Top 10
• Next.js Security Best Practices
• Supabase Security