GCP’s native WIF implementation, used primarily to allow GKE workloads and external identity providers to access Google Cloud services without service account keys.
Google Cloud Workload Identity Federation solves the service account key problem for GCP: instead of creating and distributing static service account keys, workloads running in GKE or other GCP-native environments exchange their platform-issued token for short-lived Google credentials, without any stored secret. For workloads that live inside GCP and access Google Cloud services, this is the right architectural pattern. The limitations appear at the edges. GCP WIF is designed for the GCP trust boundary. When a workload also needs to reach an AWS service, a third-party SaaS API, a legacy database, or an on-premises system, the mechanism does not extend to those targets. Aembit operates above the cloud-provider layer. It can consume the OIDC token that GCP issues as a workload attestation, extend it into access decisions for targets anywhere, and layer conditional access controls on top. Organizations that already use GCP WIF for same-cloud access can add Aembit to cover the access paths GCP cannot reach natively.
Aembit does not replace Google Cloud WIF. For GKE workloads authenticating to Google Cloud services within GCP’s trust boundary, WIF is the right architectural choice.
Aembit accepts GCP-issued OIDC tokens as workload identity attestations. When a GKE workload or other GCP-native workload presents its OIDC token to Aembit, Aembit verifies it, evaluates the access policy, and issues credentials for whatever target service the workload needs to reach — an AWS service, a third-party SaaS API, a legacy database, or an on-premises system. The workload uses its existing GCP identity; Aembit extends that identity’s reach beyond the GCP trust boundary.
Organizations already using GCP WIF for GKE-to-Google-Cloud access do not need to replace that pattern. Aembit handles the access paths that fall outside GCP’s native reach.
Resources:
Google Workload Identity Federation credential provider
Client workload setup (GCP/GKE)
Google Cloud WIF does what it was built for: frictionless, secretless authentication for workloads running inside GCP, using Kubernetes service account tokens or other GCP-native identity signals. The service account key problem is eliminated for the access paths that stay within Google Cloud.
Aembit handles three things GCP WIF was not designed for.
First, the last mile. Services that don’t support Google Cloud auth natively — third-party SaaS APIs, legacy on-premises systems, databases outside GCP — still need a credential delivery mechanism. Aembit fetches and injects those credentials at runtime without the workload ever storing them.
Second, multi-cloud trust. A workload in GKE frequently needs to reach AWS or Azure services. Rather than configuring and maintaining 1:1 WIF trust relationships between cloud providers, Aembit provides a centralized access policy plane that abstracts that complexity, with one policy model regardless of where the workload or the target lives.
Third, conditional access. GCP WIF validates the token but does not enforce contextual access controls — posture checks, time-of-day restrictions, geographic constraints — at the moment of access. Aembit layers those on top of GCP token validation, providing enforcement that basic protocol-level federation does not supply.
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