Masking with asterisk social security #'s on Adobe Acrobat

[#1]

I am trying to make fillable documents for University Students and am unable ot easily utilize masking (if thats the right method) to have their social security # be asterisks except last 4. I saw another answer but the link suggested did not work for me. When the document is returned via email I can pull the numbers for their records.

[#2 · Accepted solution]

You should not use that. It offers no protection at all. The full number can easily be extracted by anyone who has access to the file.

[#3 · Accepted solution]

You must not have personal info submitted by mail. Not just SSN but names, emails, addresses. You must use a secure https script written by a web programming professional. In some countries there are very severe penalties for breaches. 

[#4]

I have met with our Web programmers and they stated the same. Thank you for your clear and concise comments.