# 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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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.ngsurvey.com/data-encryption/file-upload-encryption.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.