# Appendix B: Authentication & Security

# Authentication & Security

## API Key Authentication

### Required Header
```
X-BL-API-Key: your_api_key_here
```

### API Key Management
- Store keys in environment variables
- Never hardcode API keys
- Rotate keys every 90 days
- Keep API keys secret

### Security Best Practices
1. Use environment variables
2. Never commit keys to version control
3. Implement key rotation
4. Monitor unauthorized access attempts
5. Use HTTPS only