| Layer | CSFS responsibility | Required proof |
|---|
| Secure access | Protected connectivity, identity and device access | Access controls and audit trail |
| Infrastructure | Hosting, VPN, firewall and network segmentation | Availability and configuration evidence |
| Monitoring | Operational visibility and threat signals | Alert coverage and response times |
| Data protection | Privacy, isolation, retention and consent | Documented policy and enforcement |
| Response | Escalation into trusted human support | Named path, owner and closure record |
““CSFS provides the secure operating environment that turns detection into trusted action.”