This card is anonymous. There is no way of using the data against the card number to locate this person. To obtain the data of this person, both the card number and the associated secret PIN (person identification number) are necessary.

Conventional security features will make it very difficult to falsify. In any event, the remote data may include another photo to facilitate identity-verification.

The data is longitudinal, a time-series from the first date when tests were carried out - this greatly improves its usefulness to potential partners. A card-owner with nothing to hide is motivated to have regular tests to make sure that the card's data is convincing. Guidelines can be published as to the recommended period between tests.