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Cloud Computing · Advanced

Tenant Isolation

Controls that keep one cloud customer's compute, network and data separate and inaccessible to other tenants.

Definition

Tenant isolation is enforced at multiple layers: hypervisor separation of VMs, virtual network segmentation, per-tenant encryption keys, and identity boundaries in multi-tenant applications. Failures can enable cross-tenant data exposure, which is one of the highest-impact cloud risks.

Example

A SaaS vendor encrypts each tenant's data with a separate key so a query bug cannot expose another tenant's plaintext.

Exam tip

Exam scenarios pairing multitenancy with confidentiality concerns expect isolation controls such as separate keys, VPCs or dedicated tenancy.

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