I need a module to enable download of a file **only after** somebody has filled out a form with valid contact information.

I need the download link to contain a uniquely generated "download key" so that one cannot bypass the download form and go straight to a download URL.

Is there a module that can do this?

I haven't seen anything like that, but ...

IowaComputerGurus.com has a password reminder module that creates a one time identifier that can be used to download a file. I think that it might be fairly easy to modify that module to use the one-time code as something that could be used to download the file. I'd probably send the code as a querystring variable that essentially vaildates the request to download the file. If you make sure that the file (or files) are in the "secure" directory, then their file names are obfuscated and never seen by the downloader.

If you have some programming skills or access to someone who does, many of the details are there.

If you look at http://dnnsilverlight.adefwebserver...ault.aspx, you will find another approach that you might be able to adapt.

Take a look at this module: http://www.snowcovered.com/Snowcove...eID=19447. It seems to do what you want. Or is close to it.