## add_digital_signature(self, digital_signature_collection) {#aspose.cells.digitalsignatures.DigitalSignatureCollection}

Adds digital signature to an OOXML spreadsheet file (Excel2007 and later).



```python

def add_digital_signature(self, digital_signature_collection):
    ...
```


| Parameter | Type | Description |
| :- | :- | :- |
| digital_signature_collection | aspose.cells.digitalsignatures.DigitalSignatureCollection |  |
### Remarks

Only support adding Xmldsig Digital Signature to an OOXML spreadsheet file


### See Also
* module [`aspose.cells`](../../)
* class [`Workbook`](/cells/python-net/aspose.cells/workbook)