Cloud Shared Responsibility Model Explained (AWS, Azure, GCP, OCI)

Every CCM answer and STAR claim lives inside a shared responsibility boundary. Mis-stating who owns encryption, identity, or logging is the fastest way to fail diligence.

Related: CCM / STAR hub · CAIQ · ThreatHawk.

Rule of thumb: The CSP secures the cloud; the customer secures what they put in the cloud — with IaaS/PaaS/SaaS shifting the line. Always check the provider’s current shared-responsibility documentation for the service you use.

Typical Split

Provider — physical facilities, hypervisor, managed control planes (varies by service)
Customer — identity, data classification, application security, logging configuration, key custody (often)
Shared — configuration baselines, incident coordination, network controls depending on service model

AWS, Azure, GCP, OCI

All four publish shared-responsibility guidance. Differences show up most in identity defaults, key management options, and which logs are on by default — verify per service before CAIQ answers.

How CyberSilo Helps

Map CCM controls in CyberSilo CSA (Compliance Standards Automation)
Monitoring evidence with ThreatHawk SIEM
Advisory for STAR readiness — contact CyberSilo

Align CAIQ Answers to Real Ownership

Document provider vs customer ownership per control in CyberSilo CSA.

Talk to CyberSilo CCM / STAR Hub

Frequently Asked Questions

Does shared responsibility remove CCM duties?

No. It clarifies which CCM controls you implement vs inherit from the CSP.

Is SaaS always the provider’s problem?

No. Customers still own account hygiene, data classification, and often identity federation.

How does SIEM fit?

Customers typically own enabling and monitoring logs even when the CSP generates them.

Hub · GCC cloud regs · CyberSilo CSA

Cloud Shared Responsibility Model Explained (AWS, Azure, GCP, OCI)

Typical Split

AWS, Azure, GCP, OCI