Adding custom data/form to pdf document

[Ed22109920f3mk]

I'm trying to create a pdf document that contains hidden embedded data.    

The content of the data would be a text string.

There will be one or more of these fields in each pdf.

Editors would augment the pdf with these fields.

Viewers would never be able to see/access these fields.

The fields would be extracted programatically using a pdf library. 

Is this possible?

What are the options?

Thanks!

[try67]

You can create a hidden text field for that purpose. The editors will need to change their visibility to be able to edit them, or they could use a script. The user will not be able to see them, and any PDF library should be able to access them just the same as any visible field.

[Test Screen Name]

But, while the users won't see them on screen, they won't be a secret. Do not use any such method for private info (such as personal comments or contact details).