## 12. Security & Compliance

### Data Privacy & GDPR Compliance

**Requirements**:
1. **Data Minimization**: Only collect necessary data
2. **Consent Management**: Explicit consent for data sharing
3. **Right to Erasure**: Ability to delete user data
4. **Data Portability**: Export user data in machine-readable format
5. **Privacy by Design**: Default privacy settings, data encryption

**Implementation**:
- Data classification (public, private, confidential)
- Encryption at rest and in transit
- Pseudonymization for analytics
- Audit logging of data access
- Data retention policies and automated cleanup

### Confidentiality & Trust Features

**Features**:
1. **Selective Data Sharing**:
   - Businesses choose what data is public vs. visible only to matches
   - Anonymous matching (reveal identity only after mutual interest)

2. **Data Masking**:
   - Hide exact quantities (show ranges: "10-50 MWh/month")
   - Hide exact locations (show approximate: "within 2km of...")

3. **Trust Scores**:
   - Verified businesses (government registration, certifications)
   - Transaction history (successful matches, ratings)
   - Platform reputation system

4. **Secure Match Introductions**:
   - Platform mediates initial contact
   - NDA templates for sensitive negotiations
   - Secure messaging within platform

### Security Infrastructure

**Security Targets**:
- **Data Breach Prevention**: Zero data breaches in production
- **Compliance**: 100% GDPR compliance audit pass rate
- **Vulnerability Management**: <24 hour patching for critical vulnerabilities
- **Access Control**: 100% of sensitive operations logged and auditable

**Implementation Details**:
- **Secrets Management**: AWS Secrets Manager with automatic rotation (<30 days)
- **Container Scanning**: Trivy + Snyk integrated in CI/CD (0 critical vulnerabilities allowed)
- **Dependency Scanning**: Automated weekly scans, automated patching for non-breaking updates
- **WAF**: CloudFlare with custom rules for API protection (blocks 99.9% of malicious traffic)
- **Database Encryption**: AES-256 encryption at rest, TLS 1.3 in transit
- **API Security**: JWT tokens with 15-minute expiration, refresh token rotation
- **Network Security**: VPC isolation, security groups, network ACLs
- **Monitoring**: Real-time security event detection and alerting

**Security Operations**:
- **Incident Response**: <1 hour detection, <4 hours containment, <24 hours resolution
- **Penetration Testing**: Quarterly external audits, automated vulnerability scanning
- **Access Reviews**: Quarterly access privilege reviews and cleanup
- **Security Training**: Annual security awareness training for all team members

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