http://dl.gi.de/handle/20.500.12116/33167 2026-07-22T22:10:47Z http://dl.gi.de/handle/20.500.12116/33186 Agent-based Models as a Method to Analyse Privacy-friendly Business Models in an Assistant Ecosystem Kubach, Michael; Fähnrich, Nicolas; Mihale-Wilson, Cristina Roßnagel, Heiko; Schunck, Christian H.; Mödersheim, Sebastian; Hühnlein, Detlef Various projects and initiatives strive towards designing privacy friendly open platforms and ecosystems for digital products and services. However, besides mastering technical challenges, achieving economic viability and broad market success has so far proven to be difficult for these initiatives. Based on a publicly funded research project, this study focuses on the business model design for an open digital ecosystem for privacy friendly and trustworthy intelligent assistants. We present how the agent-based modelling technique can be employed to evaluate how business models perform in various constellations of an open digital ecosystem. Thus, our work relates to the strategic choice of suitable business models as an important success factor for privacy and security-relevant technologies. 2020-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/33185 Privacy and availability needs regarding user preferences for Smart Availability Assistant – towards a digitally enabled work life balance Saternus, Zofia Roßnagel, Heiko; Schunck, Christian H.; Mödersheim, Sebastian; Hühnlein, Detlef The use of communication technologies (CTs) enables blurring the traditional boundaries between work and private life. Many employers are worried about this situation and addressed those issues with different technological and organizational approaches. The goal of our research is to introduce improved enterprise availability management by developing an employee-friendly technological solution that actually reflects the variety of employees’ availability needs. Due to the overall aim of broadening and bridging research on an availability management, results of a quantitative study (N=821) insights into the management of individuals’ availability and key requirements regarding the development of a Smart Availability Assistant. In general, it became apparent that to appropriately design this kind of smart assistant we must not only recognize the heterogeneity of peoples’ availability preferences but also identify and meet employees’ privacy expectations by use of a Smart Availability Assistant. 2020-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/33184 On the diffusion of security behaviours Kurowski, Sebastian; Roßnagel, Heiko Roßnagel, Heiko; Schunck, Christian H.; Mödersheim, Sebastian; Hühnlein, Detlef Security behaviour has been researched from a variety of theoretical lenses, however a clear picture on the factors that foster secure behaviour is still missing. This contribution uses the diffusion of innovations theory and applies it to four exemplary security behaviours to identify how it can explain the uptake of each behaviour. In contrast to many other approaches, it focuses on the behaviour itself, not the behaving individual. We are able to show differences in the uptake of idealized security behaviours. A perceived relative advantage positively impacts the uptake of a behaviour, however this advantage seems rarely to be motivated by a perceived risk. Risk only seems to play a minor role for the diffusion of security behaviours. Additionally, the relative advantage does not seem to be a necessity for the diffusion of a behaviour. If the other properties namely compatibility, triability, observability, and low complexity of a behaviour are adequately fulfilled a successful diffusion is still possible. 2020-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/33182 Identity Management as a target in cyberwar Fritsch, Lothar Roßnagel, Heiko; Schunck, Christian H.; Mödersheim, Sebastian; Hühnlein, Detlef This article will discuss Identity Management (IdM) and digital identities in the context of cyberwar. Cyberattacks that target or exploit digital identities in this context gain leverage through the central position of IdM digital infrastructures. Such attacks will compromize service operations, reduce the security of citizens and will expose personal data - those of military personell included. The article defines the issue, summarizes its background and then discusses the implications of cyberwar for vendors and applicants digital identity management infrastructures where IdM is positioned as a critical infrastructure in society. 2020-01-01T00:00:00Z