People can be identified by means of identification documents. To ensure identification in the digital environment, a digital identity is required. This work presents a concept that is under the control of the user and allows the storage of multiple digital identities in one app. This application, the so-called identity wallet, enables both the secure storage of a sovereign document such as the national identity card, as well as the storage of identities from the municipality or from private companies, so that users can identify themselves online with different levels of assurance. In addition to identities, keys (for vehicles, hotel rooms, etc.) can also be stored. This wallet concept was tested with a total of 16 partici- pants. The participants were convinced by the concept and were ready to adopt it. The results of the study indicate that the wallet operator has an influence on the extent to which the application is trusted and whether it will be used. A small majority of the participants favored the state as the wallet operator, while the rest preferred a private company.