PDF forms and buttons

We are asked frequently “is it possible to have interactive form-filling in a secure PDF?” Here is our immediate response:

The brief answer is “no” – in fact this is a particularly problematic area where a document is encrypted, as “by definition” it cannot be amended because that would require decryption, modification of the document, and then re-encryption… which for truly secure offline documents is not possible. However, less secure solutions may be able to do this, and systems that interact with web-based facilities may also be able to do it. If you have an interactive PDF the probability is that it was produced using Adobe software, and their interaction and processing facilities are, in large measure, proprietary, so the main response would be “use Adobe reader/an Adobe-based solution” for those parts of the application that you need form-filling etc. This could mean separating a PDF into two parts, for example a secure document that was designed simply for reading etc, and some interactive forms that go with it and are essentially unprotected. Another option is to have a secure document but permit limited printing of forms – we have customers who do this, for example for medical interviews and assessments. Another option is to provide the solution entirely “on line” and have interactive forms provided programmatically and/or via standard tools such as flash or html5, or a forms builder. For Adobe’s core offerings in this area see:

http://www.adobe.com/uk/products/acrobat/create-pdf-web-forms-builder.html