If you want to find out more, here are some links to white papers and best practice guides. I recommend reading the following white papers: https://aws.amazon.com/whitepapers/aws-security-best-practices/ https://aws.amazon.com/products/security/ https://aws.amazon.com/whitepapers/#security http://docs.aws.amazon.com/IAM/latest/UserGuide/best-practices.html
