Can I password protect a form once it is filled out?

Hello! 

1.

2. Are all forms encrypted, regardless of subscription level? 

Thank you for contacting us. Forms can be password protected in order to access to fill them out, please check this guide: https://www.jotform.com/help/579-How-to-Password-Protect-a-Form

Your other questions will be addressed in separate tickets: 

2) https://www.jotform.com/answers/2521061

3) https://www.jotform.com/answers/2521082

4) https://www.jotform.com/answers/2521083