Codes are distributed by healthcare institutions, such as hospitals, municipal healthcare services, or research facilities. A code is used to provide a single user with content, tailored to him or her. For instance, a psychotherapist might provide one of their clients, who has been battling anxiety, with a code to an Internet-based self-help program, that enables people to deal with anxiety. In another example, a researcher can give out a code with their questionnaire.
Content is distributed with the help of codes, in order to protect the user’s privacy, so that no data can be linked to your identity, stored by a third party, or on the Internet. When using a code, the IP address is not logged and so you will be identified with the code itself.
This means that only those who have released the code to you can recognize who is using the Internet-based solution, if they have chosen to save this information with them. So, whatever information you may provide will be stored with the person who gave you the code, rather than on the Internet.