---
title: CloudTrail log files not encrypted with KMS
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: >-
  Docs > Datadog Security > Code Security > Infrastructure as Code (IaC)
  Security > IaC Security Rules > CloudTrail log files not encrypted with KMS
---

# CloudTrail log files not encrypted with KMS

{% callout %}
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{% alert level="danger" %}
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## Metadata{% #metadata %}

**Id:** `terraform-aws-cloudtrail-log-files-not-encrypted-with-kms` 

**Provider:** AWS

**Platform:** Terraform

**Severity:** Low

**Category:** Encryption

#### Learn More{% #learn-more %}

- [Provider Reference](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudtrail#kms_key_id)

### Description{% #description %}

CloudTrail logs contain sensitive information about account activity and should be protected from unauthorized access. If the `kms_key_id` attribute is not specified in the `aws_cloudtrail` resource block, as shown below, then the logs stored in S3 are not encrypted with a customer-managed KMS key, leaving them vulnerable to exposure or tampering:

```
resource "aws_cloudtrail" "positive1" {
  name           = "npositive_1"
  s3_bucket_name = "bucketlog_1"
}
```

Using the `kms_key_id` attribute, as in the example below, ensures that the logs are protected with strong encryption, reducing the risk of unauthorized access and helping meet compliance requirements:

```
resource "aws_cloudtrail" "negative1" {
  name           = "negative1"
  s3_bucket_name = "bucketlog1"
  kms_key_id     = "arn:aws:kms:us-east-2:123456789012:key/12345678-1234-1234-1234-123456789012"
}
```

## Compliant Code Examples{% #compliant-code-examples %}

```terraform
resource "aws_cloudtrail" "negative1" {
  name                          = "negative1"
  s3_bucket_name                = "bucketlog1"
  kms_key_id                    = "arn:aws:kms:us-east-2:123456789012:key/12345678-1234-1234-1234-123456789012"
}
```

## Non-Compliant Code Examples{% #non-compliant-code-examples %}

```terraform
resource "aws_cloudtrail" "positive1" {
  name                          = "npositive_1"
  s3_bucket_name                = "bucketlog_1"
}
```