Context
Removing a downloaded service-account key can improve credential handling, but the replacement identity chain still needs review. An engineer or workload must be authorized to impersonate the target identity, and that identity needs a deliberate resource boundary. Document both parts before calling the migration complete.
Inventory the current key-dependent workflow
Identify the application, deployment job or administrative task using the stored key. Record its environment, required operations and how the credential is distributed. Include scheduled or rarely used tasks that may not appear in a short observation window. Do not copy the key into the migration plan; record its protected reference and owner. Establish who can approve access changes and which business workflow must continue during the transition. A secret found in one configuration file may have additional consumers elsewhere.
Describe the impersonation trust chain
Google Cloud documents service-account impersonation and the permissions involved in obtaining short-lived credentials for another identity. Review the source caller, target service account and resource permissions separately. Granting permission to impersonate an identity can expose all the access that identity holds. Avoid broadening the target role just to resolve the first failed request. Confirm the supported authentication approach for the specific runtime or tool rather than assuming every library automatically uses the desired impersonation path.
Test approved and denied actions
Exercise the intended workflow against a controlled environment and verify which identity performed the operation. Test a caller or action that must remain unauthorized without touching resources outside the approved scope. Review relevant audit evidence and keep tokens out of logs. Confirm how credentials expire and are refreshed during the workload's normal lifetime. A successful interactive command on one engineer's laptop does not establish that an unattended scheduled job will continue authenticating correctly after a restart.
Retire the old key with a recovery plan
After acceptance, locate remaining consumers before revoking the previous credential through the approved process. Update the runbook with the caller identity, target account, permission owner and troubleshooting evidence. Review who can modify the workload source or execute code with the caller's access. Reassess the chain when projects, pipelines or account roles change. The completed migration should leave a tested identity boundary and less long-lived key distribution, while preserving clear responsibility for resource authorization and operational recovery.
Discuss the environment, constraints and acceptance criteria with Clouvenix google cloud security specialists before scheduling production changes.
Technical reference
Official platform documentation. Confirm options, support status and operational behavior for the installed release. The workflow above is an engineering review approach, not a universal configuration recipe.