We are collecting private information using Survey123 and, due to privacy laws, need to ensure it is not stored in a readable format in locations out of our direct control. I'd like to look at encrypting the data on the mobile device before we upload and then decrypting it when the data returns back in house. The data to be encrypted would be names, addresses, phone numbers and email addresses. I could imagine we use a "seed" string otr value, or a simple ascii translation process. Any ideas or tips would be very welcome.