1. A method of storing data with an application server that preserves privacy of one or more data fields, the method including: receiving, at a privacy proxy server, data representing a user input with first fields to be stored with an application server and at least one second field determined by the privacy proxy server to be encrypted based upon a rule indicating a type of data to encrypt and then stored by the application server; forwarding the first fields, the second field encrypted, and a second field mark that indicates encryption of the second field to the application server to store; the privacy proxy server querying the application server for a report that includes the second field encrypted and at least one of the first fields that has not been encrypted; receiving from the application server the report comprising the at least one of the first fields in a report format and the second field encrypted with a report format placeholder; distinguishing the second field in the report as having been stored by the application server based on an encoding authentication protocol established between the privacy proxy server and the application server; wherein the report is marked with identification information that uniquely identifies the application server as storing at least the second field; decrypting the second field and replacing the report format placeholder with the second field decrypted; and causing display of the report with at least the second field decrypted; and wherein the privacy proxy server determines whether the application server resides outside a jurisdiction of the privacy proxy server.