---
title: "fileSettings.signature Property  HTML5/Flash Uploader JavaScript"
canonical: https://www.aurigma.com/docs/us8/FH_P_J_$au_amazonS3Extender_fileSettings_signature.htm
product: "Upload Suite 8"
---

# fileSettings.signature Property HTML5/Flash Uploader JavaScript

Supported technologies:
 
Gets or sets a HMAC signature constructed using the secret key of the provided [accessKeyId](https://www.aurigma.com/docs/us8/FH_P_J_$au_amazonS3Extender_accessKeyId.htm.md).

## Syntax
 
```
as3.converters( [
        {
            //...other params...
            signature: "",
            //...other params...
        }
    ]
})
```
 
### Property Value
 
Type: **String**
 
The HMAC signature constructed using the secret key of the provided **accessKeyId**.
 
Default value is **""**.