Web Forms :: Securing Images From Unauthorized Access?

Jan 23, 2011

I am working with Staff Images and Staff Dependants Images (photos) and I have to deal with such images among Adobe LiveCycle Forms, File System JPEG Format, Storing them in SQL Server, and finally, displaying them in regual web forms (ASPX).

In order to have the most reasonable and flexible desing, I did the following to:

1. Load the image from predefined location defined in web.config.

2. Convert the images to Memory Stream,

3. Convert the images to Base64 format,

4. Convert the image to XML Node.

In web.config, I defined the following:


I load the Staff Photo into Memory Stream as follows:


And I create the Base64 XML Node as follows:


As a matter of fact, all above is working 100% correctly while dealing with Adobe LiveCycle Form, for Loading and Saving Imgaes from/to PDF.

The above method will allow me to finally save images to SQL Server field type varbinary(max) and also into File System as regular image files. Also, I have full security and control over the images, becuase the above method will allow me to have full control for who is authorized to get/view the images. The end-user does not have direct access to where the images are stored.

How to use the above method to display the image on a regular ASPX Web Page using Image Server Control ? I do not want to use the src='path to image file', I want to be able to push the image content/binary to the IE without providing a link to the image file, how I can do this ?

My objective is to prevent the user from having direct access to the image files from the Browser.

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