What are the security settings to lock down a form with fillable fields and yet allow someone with Reader to fill in the fields as will as save the form and print it?

Question

What are the security settings to lock down a form with fillable fields and yet allow someone with Reader to fill in the fields as will as save the form and print it?

Answer 1

You want to allow someone to open your document and fill out the form (in the fields you have created), but not change or edit the form, right? Here's the answer - assuming you are using Acrobat Pro and someone will be opening the PDF using at least Acrobat Reader 9 and up:
Tools > Protection > Encrypt < Encrypt with Password
Answer YES to change the security.
A new window opens:
     Do NOT select Document Open (or that will require a password to open the document.)
     Select: Permissions (Check the box next to "Restrict editing and printing of the document.")
     Change the following 2 settings from the drop-down box:
          Printing Allowed: Select High Resolution
          Changes Allowed: Select Commenting, filling in form fields, and signing signature fields
          Leave selected: "Enable text access for screen reader devices for the visually impaired"
          Change Permissions Password (insert a strong password)
          Leave all other settings alone in "Options"
          OK - OK
          Re-enter the Permissions Password (the one you entered above)
          OK - OK
          Save the PDF to apply the security [notice that (SECURED0 will appear after the document title]