KMS key with an EMR Notebook

As local file system encryption on EMR is based on EBS encryption mechanism and it supports encryption using customer managed KMS key, you can use it.

See: https://docs.aws.amazon.com/kms/latest/developerguide/services-ebs.html https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-data-encryption-options.html