# Know Foolery - Non functional requirements

## Performance
- **Response Time**: API responses under 200ms for 95% of requests
- **Concurrent Users**: Support for 1000+ simultaneous players
- **Database Performance**: Query response times under 100ms
- **Cross-Platform**: Consistent performance across web, mobile, and desktop

## Security
- **Authentication**: OAuth 2.0/OIDC with Zitadel
- **Authorization**: Role-based access control (RBAC)
- **Data Protection**: Encryption at rest and in transit
- **Input Validation**: Comprehensive sanitization of all user inputs
- **Game Integrity**: Server-side validation to prevent cheating

## Scalability
- **Microservices Architecture**: Independent scaling of components
- **Database**: PostgreSQL with read replicas for high availability
- **Caching**: Redis for session state and frequently accessed data
- **Auto-scaling**: Kubernetes-based horizontal scaling

## Reliability
- **Uptime**: 99.9% availability target
- **Backup**: Automated daily backups with point-in-time recovery
- **Monitoring**: Comprehensive observability with alerting
- **Failover**: Automatic failover for critical components

## Compliance & Privacy

### Data Protection
- **GDPR Compliance**: Right to be forgotten, data portability
- **Data Minimization**: Collect only necessary player information
- **Anonymization**: Leaderboard data anonymized for privacy
- **Consent Management**: Clear privacy controls and consent

### Audit & Compliance
- **Audit Trails**: Comprehensive logging of all administrative actions
- **Compliance Reporting**: SOC 2, ISO 27001 compliance capabilities
- **Data Retention**: Defined policies for data lifecycle management