- Security Token Service (STS) enables you to create temporary, limited-privileges credentials to access your AWS resources
- Short-term credentials (you configure expiration period)
- Use cases:
- Identity Federation: manage user identities in external systems, and provide them with STS token to access AWS resources
- IAM Roles for cross/same account access
- IAM Roles for Amazon EC2: provide temporary credentials for EC2 instances to access AWS resources
