# Security enhanced AMIs
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AMS provides security enhanced images (AMIs) based on CIS Level 1 benchmark for a subset of AMS's supported operating systems. To find which operating systems have a security enhanced image available, see the *AWS Managed Services (AMS) Customer Security Guide*. To access this guide, open AWS Artifact, select **Reports** in the left navigation pane, and then filter for AWS Managed Services. For instructions on how to access AWS Artifact, contact your CSDM or see [Getting Started with AWS Artifact](https://aws.amazon.com/artifact/getting-started) for more information.