Save completed form so others cannot alter fields




I'm hoping someone can help me with this problem. I have created a very simple PDF form with areas that need to be filled in. I brought the PDf through LiveCycle and placed text fields and enabled the security rights so others can fill-out and save this file to their computer. The only problem is when they send it on, others can edit these fields. Without using Acrobat Professional, is there a way for them to be able to save this file so after they have filled out the information nobody else change it? This might be a simple question, but I have been trying to figure it out for a while!