AWS re:Invent 2016: IAM Best Practices to Live By (SAC317)
This session covers AWS Identity and Access Management (IAM) best practices that can help improve your security posture. We cover how to manage users and their security credentials. We also explain why you should delete your root access keys—or at the very least, rotate them regularly. Using common use cases, we demonstrate when to choose between using IAM users and IAM roles. Finally, we explore how to set permissions to grant least privilege access control in one or more of your AWS accounts.
via Amazon Web Services