How to detect a measurement or print disabled DWF file

Autodesk Inventor R11 DWF Extension provides the ability to publish measurement and/or print disabled DWF files.

This is made possible by encrypting the data inside the DWF stream. An application that obeys the security intentions, e.g. Autodesk DWF Viewer or Autodesk Design Review, can decrypt the data. The technology behind this is a security toolkit, used internally, that Autodesk does not currently share with the public. If Autodesk were to share the security toolkit, someone could develop an application that would bypass the security controls and thwart the publisher's intentions.

The Autodesk DWF Toolkit is publicly available at no charge. Autodesk Programmer, James Lu, noted that DWF Toolkit programmers can determine if they have an encrypted DWF via two ways:

1. Online:
   Programmers can examine the MIME type.
   
   Example:
   DWFString zMime = pRes->mime();
   if (zMime == DWFCore::DWFMIME::kzMIMEType_W3D_S)

2. Offline:
   Programmers can find the following sections in the manifest.xml.
   
   Example:
   <dwf:Resource role="Rights Document" mime="text/xml"
   <dwf:Resource role="3d streaming graphics" mime="application/x-w3d-s"
   
   There is “-s” after x-w3d.

Autodesk is working to maintain the security of design data for its customers.