Shared Responsibility Model
Key Points
- Splits duties across provider and customer
- Used in cloud security and operations
- Clarifies who manages which control
- Applies differently by service model
- Responsibility boundaries depend on service model (IaaS, PaaS, SaaS)
- Requires clear documentation to avoid security gaps
Definition
Shared Responsibility Model is a cloud framework that divides security and operational duties between the provider and the customer by assigning responsibility for infrastructure, platform, applications, configuration, identity, and data according to the service model in use.
Concept
Shared Responsibility Model combines cloud service delivery with operational and security governance. It exists to show which responsibilities belong to the provider and which remain with the customer. The split depends on the service model and affects configuration, security, data, and application management. It is used in cloud computing, managed services, and infrastructure operations.
Explainer
Shared Responsibility Model is the cloud operating framework that divides duties between the service provider and the customer. It works by assigning responsibility for infrastructure, platform, applications, configuration, identity, and data according to the service model in use. It is used in public cloud, managed services, and hybrid architectures.
Constraints include differences between IaaS, PaaS, and SaaS responsibility boundaries, the need for clear documentation, and the risk of hidden assumptions about who owns a control.
Failure modes include security gaps, misconfigured services, compliance misunderstandings, and disputes over incident response obligations.
Tradeoffs involve convenience versus direct control, provider-managed simplicity versus customer-managed flexibility, and standardized service models versus responsibility ambiguity.
Shared Responsibility Model matters because cloud security and operations depend on clear ownership of controls. Cross-industry relevance is very high across cloud adoption, enterprise IT, and regulated environments.