Please help me understand how encrypted forms work.

I have created an encrypted form, but I am confused as to why it does not require a key on the computer I created it on. Is this IP specific? 

Can you please explain in better detail in what circumstances it will be encrypted versus not? I could not find the answers to my question in your segment on encrypted forms.

Thank you.

Please be noted that the private key is required to decrypt the form submissions. Generally, the key is stored in the browser storage once you upload after logging in to your account. However, if the browser caches are cleared, you'll be required to upload the private key again in order to view the submissions decrypted. Please refer to the following guide that can help you with more information on encrypted forms. 

https://www.jotform.com/help/344-Encrypted-Forms-and-How-to-Use-Them

Hope this information helps!