> For the complete documentation index, see [llms.txt](https://docs.syntho.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.syntho.ai/configure-a-data-generation-job/configure-column-settings/mask/uuid.md).

# UUID

Below is a list of available UUID mask functions.

## **Hash**

The Hash ensures consistent anonymization by mapping each UUID to a new, uniquely generated UUID. This transformation preserves uniqueness and referential integrity while ensuring that the original values cannot be traced back. Identical input UUIDs will always produce the same hashed output. To ensure accurate ordering, please see [ordering and indexing considerations](/configure-a-data-generation-job/configure-column-settings/consistent-mapping.md#ordering-and-indexing-considerations).

#### **Parameters**

* No parameters.

#### **Example** <a href="#example---shifting-a-set-of-dates" id="example---shifting-a-set-of-dates"></a>

If you configure:

```
Column names:
1cb29fe0-cd08-4bc7-8c43-c5f132e8af3b,
5764c99f-e3e7-4a5d-95bb-f667c6b71de9,
5764c99f-e3e7-4a5d-95bb-f667c6b71de9,
...
```

The results will be:

```
Column names:
yWlRcHBNHm34kvegsQveOijBPYV6xO4l,
NjSEpGvyLeBC3x2UU8a OKq5VPYGvGmG,
NjSEpGvyLeBC3x2UU8a OKq5VPYGvGmG,
...
```

<figure><img src="https://content.gitbook.com/content/U61B9DqtWCNO3Z30vnjh/blobs/86sH6CKqjAtdvM1Ha49b/image.png" alt="" width="510"><figcaption><p>Hash</p></figcaption></figure>


---

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