When multiple tenants share the same infrastructure, "trust us" isn't good enough; security teams need proof. In this hands-on lab, you'll see how VAST enforces tenant isolation at the I/O level, verifying that one tenant's data is never visible to another, even under the hood. You'll also configure encryption using an external KMS, giving each tenant control over their own keys rather than relying on a shared trust boundary. From there, you'll set up tenant admin delegation, QoS, and monitoring, so you leave with a concrete, auditable model for running secure multi-tenant environments on VAST.