> For the complete documentation index, see [llms.txt](https://docs.ngsurvey.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ngsurvey.com/data-encryption/file-upload-encryption.md).

# File Upload Encryption

Using file encryption you can apply encryption to any files that are uploaded to your survey using the [file upload answer](/form-management/form-designer/questions/question-types/advanced-types/file-upload.md) type. 

If you expect highly confidential files from the respondent we would suggest you to set your file upload answer type data classification to [restricted](/data-encryption/data-classification/restricted.md) for maximum security. This way ngSurvey will encrypt the whole file using your public PGP key and you will be the only person who will be able to decrypt the file using your private PGP key and passphrase.

{% hint style="info" %}
Using the [completion alert](/form-management/tasks/task-items/completion-alert.md) you can receive the encrypted attachment directly in your email. 
{% endhint %}


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