Ensure that your Amazon Machine Images (AMIs) are encrypted to fulfill compliance requirements for data-at-rest encryption. The Amazon Machine Image (AMI) data encryption and decryption is handled transparently and does not require any additional action from your applications.
When dealing with production data that is crucial to your business, it is highly recommended to implement data encryption in order to protect it from attackers or unauthorized personnel. The AMI encryption keys are using AES-256 algorithm and are entirely managed and protected by the AWS key management infrastructure through AWS Key Management Service (KMS).
To identify any unencrypted AMIs created within your AWS account, perform the following:
To encrypt any unencrypted Amazon Machine Images available within your AWS account, you need to create AMIs with encrypted snapshots from AMIs with unencrypted snapshots by copying them. To implement the AMI encryption process, perform the following: