EncryptionConfiguration
Settings to configure server-side encryption.
For additional control over security, you can encrypt your data using a customer-managed key for Step Functions state machines and activities. You can configure a symmetric KMS key and data key reuse period when creating or updating a State Machine, and when creating an Activity. The execution history and state machine definition will be encrypted with the key applied to the State Machine. Activity inputs will be encrypted with the key applied to the Activity.
Step Functions automatically enables encryption at rest using Amazon Web Services owned keys at no charge. However, KMS charges apply when using a customer managed key. For more information about pricing, see Key Management Service pricing.
For more information on KMS, see What is Key Management Service?