# Security Documentation

## Security Overview

The DeFi Oracle Meta Mainnet implements multiple layers of security to protect the network and its users.

## Key Management

### Validator Keys

- Stored in Azure Key Vault
- Never stored on disk
- Rotated every 90 days
- Access restricted to validators only

### Oracle Keys

- Stored in Azure Key Vault
- Used via EthSigner
- Rotated every 90 days
- Access restricted to oracle publisher service

### Key Rotation

1. Generate new keys
2. Update Key Vault
3. Update node configurations
4. Restart nodes
5. Verify new keys are working
6. Remove old keys after verification

## Network Security

### Network Segmentation

- **Validators**: Private subnets, no public IPs
- **Sentries**: Public subnets, P2P access only
- **RPC Nodes**: DMZ subnet, HTTPS only

### Firewall Rules

- **Validators**: Internal communication only
- **Sentries**: P2P (30303) and internal communication
- **RPC Nodes**: HTTPS (443) and internal communication

### TLS/SSL

- TLS 1.2+ for all HTTPS connections
- mTLS for internal communication
- Certificate rotation every 90 days

## Access Control

### Node Permissioning

- Static node allowlists
- Prevents unauthorized nodes from joining
- Updated via configuration files

### Account Permissioning

- Account allowlists for RPC methods
- Prevents unauthorized transactions
- Updated via configuration files

### API Gateway

- Rate limiting per IP
- API key authentication (optional)
- Method allowlists
- CORS configuration

## Security Monitoring

### Logging

- All node operations logged
- Structured logging (JSON)
- Log aggregation (Loki)
- Log retention (30 days)

### Monitoring

- Prometheus metrics
- Alert rules for security events
- Grafana dashboards
- Alertmanager notifications

### Incident Response

- Security incident playbook
- Incident response team
- Escalation procedures
- Post-incident reviews

## Vulnerability Management

### Regular Audits

- Code audits quarterly
- Security audits annually
- Penetration testing annually
- Dependency updates monthly

### Patch Management

- Security patches applied within 24 hours
- Regular updates for dependencies
- Node software updates quarterly
- Emergency patches as needed

## Compliance

### Data Protection

- No personal data stored on-chain
- Privacy by design
- Data retention policies
- GDPR compliance (if applicable)

### Access Logging

- All RPC requests logged
- Access logs retained for 90 days
- Audit trails for admin operations
- Compliance reporting

## Security Best Practices

### For Operators

1. Use strong passwords
2. Enable multi-factor authentication
3. Rotate keys regularly
4. Monitor security alerts
5. Keep software updated

### For Developers

1. Follow secure coding practices
2. Use dependency scanning
3. Perform code reviews
4. Test security controls
5. Document security assumptions

### For Users

1. Verify contract addresses
2. Use trusted RPC endpoints
3. Check transaction details
4. Monitor account activity
5. Report suspicious activity

## Security Incidents

### Reporting

- Report security issues to security@d-bis.org
- Include detailed information
- Do not disclose publicly until fixed

### Response

1. Acknowledge receipt
2. Assess severity
3. Develop mitigation
4. Deploy fix
5. Notify users
6. Post-incident review

## Security Contacts

- **Security Team**: security@d-bis.org
- **Emergency**: +1-XXX-XXX-XXXX
- **PGP Key**: [Link to PGP key]

## Security Resources

- [OWASP Top 10](https://owasp.org/www-project-top-ten/)
- [Ethereum Security](https://ethereum.org/en/developers/docs/security/)
- [Besu Security](https://besu.hyperledger.org/en/stable/)