C8 Above Security

Processing Integrity

• Data entry controls
• Field / sign / limit / range / size / completeness / validity check / reasonableness test / check digit verification
• Additional online data entry controls
• Prompting: request each input data item, and wait for acceptable response
• Processing controls
• File labels: header record, trailer record
• Transposition error, cross-footing tests, concurrent update controls
• Output controls
• Parity checking, echo check

Availability

• Fault tolerance, UPS (uninterruptible power supply)
• Backup (incremental / differential), restoration, RPO (recovery point objective)
• Real-time mirroring, checkpoint, RTO (recovery time objective)
• Backup → (Max = RPO) → Incident → (Max = RTO) → Restoration