The AWS cloud infrastructure has been architected to be one of the most flexible and secure cloud computing environments available today. Security for AWS is about three related elements: visibility, auditability and control. You have to know what you have and where it is before you can assess the environment against best practices and internal or compliance standards. Controls enable you to place precise, well-understood limits on the access to your information. Did you know, for example, that you can define a rule that says: "Tom is the only person who can access this data object that I store with Amazon, and he can only do so from his corporate desktop on the corporate network, from Monday-Friday 9-5 and when he uses MFA?" That's the level of granularity you can choose to implement if you wish.