Cloud IAM: separate the owner, human users and application roles
Protect the recovery owner, use roles for day-to-day access and give workloads their own limited credentials.
In brief
Cloud identity and access management controls who or what can act on resources. One shared owner login for people and applications makes a leak difficult to contain and access difficult to explain.
Separate the account’s emergency ownership from normal human access and machine identities.
Protect ownership separately
Use the provider’s recommended owner protections and recovery route. For AWS, root-user access is distinct from normal IAM or federated access. Keep ownership available for the tasks that genuinely require it, rather than using it for routine administration or storing its credentials in builds.
Give the application a defined role
Prefer supported workload roles and temporary credentials over embedding a long-lived account key. Limit actions and resources: reading one storage location does not require administering every resource. Test the application with its actual role, including failure when attempting an action outside its job.
Review the effective policy
Inspect inherited policies, cross-account access and unused credentials. Provider policy-analysis tools can help, but review their findings in context. Stage removals and confirm backups and deployment can still operate; a policy cleanup is incomplete if it leaves no usable recovery route.
Before you act
Role names and policy behaviour vary by provider. A role labelled “viewer” may still expose sensitive data; test the actions it permits, not just the label.
What to do next
- Identify the protected owner/recovery account and secure it with supported MFA.
- Create individual human access and separate workload roles with the required resource scope.
- Review unused credentials and verify recovery before removing broad legacy access.
