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# PDFKeyLengthEnum

PDFKeyLengthEnum enumeration constants are used to set the encryption key length when the exported PDF file is encrypted with the RC4 algorithm.

<Note>
  All values except PDFKL\_40Bit require PDF version 1.4 or greater (see [IPDFExportFeatures::PDFVersion](/fine-reader/engine/api-reference/parameter-objects/export-parameters/pdfexportfeatures#pdfversion) ).
</Note>

```
typedef enum {
 PDFKL_40Bit = 5,
 PDFKL_48Bit = 6,
 PDFKL_56Bit = 7,
 PDFKL_64Bit = 8,
 PDFKL_72Bit = 9,
 PDFKL_80Bit = 10,
 PDFKL_88Bit = 11,
 PDFKL_96Bit = 12,
 PDFKL_104Bit = 13,
 PDFKL_112Bit = 14,
 PDFKL_120Bit = 15,
 PDFKL_128Bit = 16
} PDFKeyLengthEnum;
```

## Elements

| Name            | Description                 |
| --------------- | --------------------------- |
| PDFKL\\\_40Bit  | The key length is 40 bits.  |
| PDFKL\\\_48Bit  | The key length is 48 bits.  |
| PDFKL\\\_56Bit  | The key length is 56 bits.  |
| PDFKL\\\_64Bit  | The key length is 64 bits.  |
| PDFKL\\\_72Bit  | The key length is 72 bits.  |
| PDFKL\\\_80Bit  | The key length is 80 bits.  |
| PDFKL\\\_88Bit  | The key length is 88 bits.  |
| PDFKL\\\_96Bit  | The key length is 96 bits.  |
| PDFKL\\\_104Bit | The key length is 104 bits. |
| PDFKL\\\_112Bit | The key length is 112 bits. |
| PDFKL\\\_120Bit | The key length is 120 bits. |
| PDFKL\\\_128Bit | The key length is 128 bits. |

## Used in

[IPDFEncryptionInfo::KeyLength](/fine-reader/engine/api-reference/parameter-objects/export-parameters/pdfencryptioninfo#keylength)