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 encrypted form feature in this guide: http://www.jotform.com/help/344-What-are-Encrypted-Forms-and-how-to-use-them-as-expert.
Basically, when you enable the encrypted feature of the form, it will allow you encrypt the submission data for new submission, it will also generate a unique key for you that you need to download for safe keeping. Please note that we do not store the key in our servers, which means if you lose your key, there's little or nothing that we can do to decrypt the encrypted data.
Do let us know if you need more information on this.