The validation includes the update of the validity imprint on the processor chip card and the validity entry in the desfire chip. The processor chip card has a Thermo Read Write strip. The temperature dependence of the strip allows repeated writing and erasing.

Validation of the processor chip card is only possible at the validation terminals on the university campus.

The self service terminals, on the other hand, offer the possibility of performing online student and exam administration functions. The authorisation to use these functions depends on the validation status of the card and is only determined by the validity of the electronic certificate stored in the contact crypto-processor.