Implementation and System Integration

Cross-border authentication based on provisions of the European eIDAS Regulation and cross-border data exchange according to the European Single Digital Gateway Regulation (SDGR) are usually implemented using Web technologies. Consequently, the solutions currently deployed are tailored toward usage scenarios involving Web browsers on traditional end-user devices such as desktop computers or laptops. Such solutions are often difficult to apply to mobile devices like smartphones, since these devices come with different characteristics, capabilities, and limitations. Enabling cross-border authentication and cross-border data exchange on mobile devices hence requires new technical solutions and respective implementations that take into account the special requirements of current mobile devices. This chapter elaborates on the technical details of this issue. It identifies practical technical challenges in implementing eIDAS and SDG-based cross-border authentication and data exchange involving mobile end-user devices. This chapter also discusses strategies to overcome these challenges and evaluates proposed strategies by means of technical implementations relying on state-of-the-art mobile technologies. It then establishes how cross-border authentication based on the eIDAS Regulation and cross-border data exchange based on the SDG Regulation are indeed feasible on mobile devices and show directions toward suitable implementations.