**Inheritance:**
java.lang.Object, com.aspose.ms.System.ValueType, com.aspose.ms.System.Enum
```
public final class PdfEncryptionAlgorithm extends System.Enum
```

Specifies the encryption algorithm to use for encrypting a PDF document.
## Fields

| Field | Description |
| --- | --- |
| [RC4_128](#RC4-128) | Specifies the encryption algorithm to use for encrypting a PDF document. |
| [RC4_40](#RC4-40) | Specifies the encryption algorithm to use for encrypting a PDF document. |
### RC4_128 {#RC4-128}
```
public static final int RC4_128
```


Specifies the encryption algorithm to use for encrypting a PDF document.

### RC4_40 {#RC4-40}
```
public static final int RC4_40
```


Specifies the encryption algorithm to use for encrypting a PDF document.