> For the complete documentation index, see [llms.txt](https://docs.umbraco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.umbraco.com/umbraco-ui-builder/17.latest/advanced/encrypted-properties.md).

# Encrypted Properties

Umbraco UI Builder allows encrypting properties to store sensitive information securely. When a property is marked as encrypted, its value is automatically encrypted before storage and decrypted upon retrieval.

{% hint style="info" %}
Umbraco UI Builder uses the `IDataProtectionProvider` instance registered in the DI container for encryption and decryption. To modify the encryption algorithm, replace the `IDataProtectionProvider` instance in the DI container.
{% endhint %}

## Defining Encrypted Properties

### Using the `AddEncryptedProperty()` Method

Encrypts the specified property. The property must be of type `String`. The value is encrypted before storage and decrypted when retrieved.

#### Method Syntax

```csharp
AddEncryptedProperty(Lambda encryptedPropertyExpression) : CollectionConfigBuilder<TEntityType>
```

#### Example

```csharp
collectionConfig.AddEncryptedProperty(p => p.Secret);
```


---

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