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.
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It is possible to encrypt submitted data. More about Encrypted Forms and how to use them you can find in this articles:
Regarding JotForm server security - The forms and submissions are transmitted securely with a 256 bit high-grade encryption. You can also log into JotForm site securely and download your submission reports over a secure connection using https://www.jotform.com.
We provide a very high security through out our hosting provider's servers for stored data. We have a very powerful cloud of servers in SSAE16 Audited facilities which provides security protection against malicious attacks like SQL injection and denial of service (DOS) attacks.
All forms are by default secure.
If you want your form user to know that their data will be sent securely, you can add enable security certificate seal in your form. Here is a guide which you can refer: http://www.jotform.com/help/131-Enabling-Security-Certificate-Seal-on-Secure-Forms
Hope this will help. Let us know if you need further assistance.