A system and method are presented to enable computers to communicate and to exchange personal data in a secure system where security is achieved by a computer de-identifying the personal data through the removal of all personal identifiers and subsequently re-identifying the data with an anonymous identifier generated by the computer operated by the data subject. Even though the personal data and the data subject are anonymized, the computers in the present system are able to establish a communications session between the anonymous data subject's computer and the computer system holding information of interest to the data subject and to send that information to its owner.