Abstract: Disclosed are various embodiments that facilitate client-side encryption of form data. A network page is sent to a client. The network page includes executable encryption code configured to encrypt a form data item. The client is configured to receive the form data item via a form field of the network page. In response to receiving the form data item from the client, it is determined whether the form data item that has been received has been encrypted in the client by the executable encryption code. The form data item is then encrypted when the form data item that has been received has not been encrypted in the client by the executable encryption code. However, the form data item is not encrypted when the form data item that has been received has been encrypted in the client by the executable encryption code.

Abstract: Disclosed are various embodiments that facilitate client-side encryption of form data. A network page that includes client-side code that encrypts one or more data items using a public key is sent to the client. The data items are provided by a user in one or more form fields of the network page. The data items and one or more unencrypted data items are obtained from the client over an encrypted channel. The data items are encrypted using the public key when the data items have not been encrypted by the client-side encryption code. The data items are sent in an encrypted state to a server over an internal network. A firewall is interposed between the internal network and the server to protect the server from the internal network.