Amazon Elastic File System (EFS) is a serverless file system that does not require provisioning or managing storage. Stored files can be automatically encrypted by the service. In the case that adversaries gain physical access to the storage medium or otherwise leak a message they are not able to access the data.

Ask Yourself Whether

There is a risk if you answered yes to any of those questions.

Recommended Secure Coding Practices

It’s recommended to encrypt EFS file systems that contain sensitive information. Encryption and decryption are handled transparently by EFS, so no further modifications to the application are necessary.

Sensitive Code Example

For aws_cdk.aws_efs.FileSystem and aws_cdk.aws_efs.CfnFileSystem:

from aws_cdk import (
    aws_efs as efs
)

efs.FileSystem(
    self,
    "example",
    encrypted=False  # Sensitive
)

Compliant Solution

For aws_cdk.aws_efs.FileSystem and aws_cdk.aws_efs.CfnFileSystem:

from aws_cdk import (
    aws_efs as efs
)

efs.FileSystem(
    self,
    "example",
    encrypted=True
)

See