Prevent Detach of Attachments

Is there anyway to prevent attached documents from being detached from a form by users who only have reader access to that form? I want them to be able to launch or view the documents but not detach them. The documents are secured PDF files.

Subject: Prevent Detach of Attachments

No, I don’t think so. Just by the very nature of launching a file, you are putting a copy of it in a local cache, at least while it’s open. That’s basically the same type of access as launch.

You might have more success if you put the content in a notes doc. You could restrict the ability to copy, print, etc. at that point, and there’d be no need to have the doc on local/cache ever.