> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/appsec-rules/iac-security/storage/appsec-gcp-43.md).

# GCP KMS Symmetric key not rotating in every 90 days misconfiguration detected in code

## Rule Details

|                        |                                      |
| ---------------------- | ------------------------------------ |
| Cortex AppSec Rule ID  | APPSEC\_GCP\_43                      |
| Category - Subcategory | Storage - Alerting                   |
| Provider               | GCP                                  |
| Severity               | LOW                                  |
| Framework              | Terraform, Terraform Plan            |
| Mapped CSPM/KSPM Rule  | 6e394124-06d4-46fc-991e-4b6102ed74da |

## Impact

Google Cloud Key Management Service stores cryptographic keys in a hierarchical structure designed for access control management. The format for the rotation schedule depends on the client library used. In Terraform, the rotation period unit must be seconds. A key is a named object representing a cryptographic key used for a specific purpose, including data protection. The key material, the actual bits used for encryption, can change over time as new key versions are created. A collection of files could be encrypted with the same key and people with decrypt permissions on that key would be able to decrypt those files. We recommend you set a key rotation period, including start time. A key can be created with a specified rotation period, which is the time when new key versions are generated automatically. A key can also be created with a specified next rotation time.

## How to Fix

*Resource:* google\_kms\_crypto\_key

* *Arguments:* rotation\_period \[source,go]

***

resource "google\_kms\_crypto\_key" "key" { name = "crypto-key-example" key\_ring = google\_kms\_key\_ring.keyring.id

* rotation\_period = "7776000s" }

***


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