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New approaches to identity management based on technologies such as blockchain and distributed ledgers are promoted as a chance to give users full control over their own identity data. Despite being often called the future of digital identity management, Decentralized Identity Management (DIdM) and Self-sovereign Identities (SSI) are still facing a number of challenges, usability being a major one: their concepts are too sophisticated for users and do not fit their mental models. We address this by conducting a study that analyses and evaluates the usability and practical applicability of some of the most advanced DIdM solutions. The results of the user tests reveal existing usability issues and outline the way they deprive end users of experiencing the entire range of claimed privacy and security benefits of these identity solutions.

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The evaluation and assessment of project results and their impact are still a recurring challenge in the digital government discipline. Many technologically driven projects or products have faced challenges, where the technology is advanced, but the market adoption and user acceptance are still lacking. To counter these challenges, this paper presents a transdisciplinary evaluation framework and how it could be applied. The foundation for the evaluation framework was a literature review on the most recent and relevant academic publications on transdisciplinary evaluations, which was narrowed down by using selected relevant search terms. This theoretical background was enhanced by a series of practical workshops to validate the findings. By using a transdisciplinary approach, this paper presents a transdisciplinary evaluation framework that enhances the evaluation process of project results in the digital government discipline with six pillars to reflect (1) the real word context, (2) interdisciplinary research, (3) going beyond science, (4) interaction (5) integration, and (6) relevance. Alongside these pillars, dimensions of measurement for the evaluation are also presented and elaborated on. While this evaluation framework could be adopted for many types of projects or products, this paper showcases how it is applied for an international digital government pilot research project throughout its development process. It presents the methodology and process used in establishing the evaluation framework, the evaluation framework itself, and a short discussion.