JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
You can learn more about the Encryption feature here: http://www.jotform.com/help/344-What-are-Encrypted-Forms-and-how-to-use-them-as-expert. Please do take note the limitations or the features that won't work if you enable the encryption feature, it is stated at the bottom part of the guide and on the frequently asked questions.
If you want to make all new forms to be encrypted by default, you can enable that option in your account settings.
Do let us know if you need more help on this.