Electronic identity documents (eIDs) in the form of contactless smartcards will in the future be more than just proof of identity. They could additionally serve as multi-functional cards that can be used in many other areas of everyday life: for instance, as a public transport ticket, as company ID or as a library card. This is indeed consumer-friendly, but will expose the smartcards to greater pressure than before. In order to adequately address new use scenarios already during the design p...