Wagener, Andreas (2023)
Nerdwaerts.de, 13.01.2023, https://nerdwaerts.de/2023/01/virtual-commerce-im-metaverse/ 2023.
Auch wenn bei Meta die Einführung holprig erscheint und Microsoft und andere Firmen ihre Strategien auf den Prüfstand stellen: Das viel diskutierte Metaverse ist schon da – jedenfalls in einzelnen Bereichen, wie etwa bei Events, Messen und Kundenveranstaltungen. Welche Ansätze gibt es? Was ist Erfolg versprechend?
Schiller, Katharina; Adamsky, Florian; Benenson, Zinaida (2023)
The ACM CHI Conference on Human Factors in Computing Systems.
E-mail phishing attacks are still the number one gateway for attackers. Even when the patch level of a network is up to date, if one employee clicks on a link in a phishing e-mail and enters their credentials on a malicious website or downloads malware, the whole organization might get compromised. Anti-phishing support systems highlight different aspects of an e-mail to help users to detect phishing e-mails. However, little is known about their effectiveness, especially in comparison to each other. This paper presents our experimental design to investigate the efficacy of various support systems. For this purpose, we created a fictional scenario and an interactive tool to display e-mails. In addition, we present our preliminary study with the first results to classify test e-mails in different difficulty levels that serve as a basis for our main study.
Pahl, Sebastian; Adamsky, Florian; Kaiser, Daniel; Engel, Thomas (2023)
23rd Privacy Enhancing Technologies Symposium (PETS).
DOI: 10.56553/popets-2023-0081
Tor is a popular privacy-enhancing technology that allows anonymous communication using onion routing. However, such technologies are only helpful if used; therefore, performance is an important aspect. One of the main performance bottlenecks of Tor is the cross-circuit interference (CCI) problem. Tor multiplexes multiple circuits over a single Transport Layer Security (TLS) 1.2 connection if they share a path segment (link). Therefore, they have the same congestion window, which can yield unfair bandwidth allocation. However, there has been little work in understanding this problem in more depth.
This paper investigates the number of simultaneously shared links in the current Tor network, which are the root cause of CCI. We developed a novel shared links simulator called SALSA to investigate this problem. Our results show that 3.7 % of active links are shared, and the involving Onion Routers (ORs) have the most common bandwidth capabilities. Additionally, we show that the internal circuits and exit policy influence the CCI problem. Furthermore, we model the number of shared links when the demand grows further and show that the number of shared links can go up to 16 %. Finally, we run Shadow simulations with a 25 % downscaled Tor network and show that a network without shared links is faster.
Atzenbeck, Claus; Herder, Eelco; Roßner, Daniel (2023)
New Review of Hypermedia and Multimedia 2023, 1–35.
DOI: 10.1080/13614568.2023.2170474
Recommender Systems are omnipresent in our digital life. Most notably, various media platforms guide us in selecting videos, but recommender systems are also used for more serious goals, such as news selection, political orientation and work decisions. As argued in this survey and position article, the paradigm of recommendation-based feeds has changed user behaviour from active decision making to rather passively following recommendations and accepting possibly suboptimal choices that are deemed “good enough”. We provide a historic overview of media selection, discuss assumptions and goals of recommender systems and identify their shortcomings, based on existing literature. Then, the perspective changes to hypertext as a paradigm for structuring information and active decision making. To illustrate the relevance and importance of active decision making, we present a use case in the field of TV or media selection and (as a proof of concept) carried over to another application domain: maintenance in industry. In the discussion section, we focus on categorising these actions on a spectrum of “system-1” (fast and automated) tasks and “system-2” (critical thinking) tasks. Further, we argue how users can profit from tools that combine active (spatial) structuring and categorising with automatic recommendations, for professional tasks as well as private, leisure activities.
Wagener, Andreas (2023)
2023.
Auch wenn noch Uneinigkeit herrscht, was eigentlich genau unter dem „Metaverse“ zu verstehen ist und welche Zielvision sich auf diesen Märkten durchsetzen wird, bieten sich in den entstehenden virtuellen Welten bereits jetzt zahlreiche Möglichkeiten im eCommerce tätig zu werden. Die verschiedenen Optionen sollen hier dargestellt und zusammengefasst werden.
Neff, Michaela; Schaaf, Jannik; Scheidt, Jörg; Khouri, Andreas; Zerr, Thomas; Storf, Holger (2023)
Neff, Michaela; Schaaf, Jannik; Scheidt, Jörg; Khouri, Andreas; Zerr, Thomas...
Proceedings of Science - Austrian Citizen Science Conference (ACSC2022) 2022
, 24.
DOI: 10.22323/1.407.0024
The citizen science project SelEe (‘Researching rare diseases in a citizen science approach‘) aims to research rare diseases in collaboration with citizens by using digital applications. SelEe adopts a participatory approach as it is important to recognise the active role of patients and their families as informed partners. They are often the experts on their own disease. Similarly, involving citizens beyond those affected can increase the visibility and understanding of rare diseases. Citizens can contribute their strengths, engage socially and learn new knowledge about digital apps, the diseases and their research. Engaging citizens in a continuous exchange of information as well as developing digital applications for research can make research more accessible to citizens while strengthening research and its relevance.
Wagener, Andreas (2023)
Die Digitalisierung des Politischen, SuB - Sozialwissenschaften und Berufspraxis.
DOI: 10.1007/978-3-658-38268-1
Die großen digitalen Plattformen bestimmen nicht nur die Regeln auf ihren Märkten, sondern wirken zunehmend auch in die gesellschaftliche Sphäre ein – mit oft als äußerst schädlich empfundenen Resultaten. Gerade in jüngster Zeit werden daher verstärkt Rufe nach einer Beschränkung der Plattformmacht, nach Regulierung oder sogar Zerschlagung der dahinterstehenden Konzerne laut. Der vorliegende Beitrag führt den Stand der Diskussion zunächst zusammen und beleuchtet die aktuellen Optionen der Plattformregulierung. Die Plattformmacht hat ihren Ursprung vor allem in der Sammlung von Daten und deren algorithmischer Auswertung im Sinne der Plattformziele. Auf dieser Grundlage gelingt es erfolgreichen Plattformen, Netzeffekte zu erzeugen, welche die eigene Machtposition weiter stärken. Dieser Kreislauf scheint mit herkömmlichen Mitteln kaum zu durchbrechen zu sein. Als Alternative zu den gegenwärtigen Ansätzen staatlicher Regulierung wird ein neu zu bewertendes Eigentumsrecht an den Daten mit entsprechenden Durchsetzungsmechanismen auf Basis der Distributed-Ledger-Technologie entworfen, die sich mit dem aktuellen Stand der technischen Entwicklung bereits heute abbilden ließen.
Wagener, Andreas (2022)
Industrie4.0-Management 06/2022, Dezember 2022, S. 51 - 53 (06/2022), S. 51 - 53.
Der Einsatz von Blockchain und Smart Contracts ermöglicht auch den Aufbau und Betrieb dezentraler autonomer Organisationen, sogenannter DAOs, die auf Grundlage eines zuvor fixierten Regelsystems automatisiert Entscheidungen treffen und an den Märkten als eigenständige Institution agieren können. Während DAOs in anderen Bereichen – in der Finanzwirtschaft und in der Creator-Economy – bereits regelmäßig zum Einsatz kommen, ist im industriellen Umfeld eine entsprechende Nutzbarmachung bislang kaum zu verzeichnen. Dabei bietet gerade die Vernetzung durch das „Internet der Dinge“ hierfür sinnvolle Anknüpfungspunkte. Der Beitrag befasst sich mit den möglichen wirtschaftlichen Adaptionsansätzen und lotet potenzielle Geschäftsmodelle aus, die sich aus der Errichtung von DAOs in der „Industrie 4.0“ ergeben könnten.
Wagener, Andreas; Kupka, Katja (2022)
Pahrmann, Corina / Kupka, Katja: Social Media Marketing. Praxishandbuch für Facebook, Instagram, TikTok & Co., 6. Auflage, O’Reilly, Heidelberg, S. 585-588, S. 585-588.
Wagener, Andreas (2022)
Welcome to the Meta(l)verse: „Virtual Metal“ – Welche Chancen und Herausforderungen ergeben sich für Metal und Metal-Festivals im virtuellen Raum? Menschen, Marken, Moshpits. Beiträge zur Heavy-Metal-Forschung, Solingen, 19.11.2022.
Wagener, Andreas (2022)
Die technisch rasant fortschreitende Entwicklung der Computergrafik in Kombination mit KI und Deep Learning ermöglicht immer realistischere Simulationen der Realität in der digitalen und virtuellen Sphäre. Auch die Darstellung von „virtuellen Wesen“ und digitalen Abbildern der Nutzer rücken dabei zunehmend in den Fokus – sowohl im spielerischen Alltag als auch im wirtschaftlichen Kontext. Dabei kursiert eine Vielzahl ähnlicher oder synonym verwendeter Begrifflichkeiten – Zeit für eine Abgrenzung.
Peinl, René; Purucker, Susanne K; Vogel, Sabine (2022)
14th International Conference on ENTERprise Information Systems (CENTERIS 2022).
Wagener, Andreas (2022)
Kaum eine Begrifflichkeit im Kontext des digitalen Marketings dürfte in jüngerer Zeit so viel Aufmerksamkeit erhalten haben, wie der Terminus des „Metaverse“. Das damit beschriebene Zusammenwachsen von virtueller und physischer Welt ermöglicht neue Geschäftsmodelle und – so glauben viele – wird die Bedingungen an den digitalen Märkten auf den Kopf stellen. Noch immer ist allerdings nicht klar, was genau unter diesem Buzzword nun eigentlich zu verstehen ist – was zur Folge hat, dass vielen der Themenkomplex noch als sehr abstrakt erscheint. Dabei sind viele der damit verbundenen Visionen bereits Realität. Dieser Beitrag versucht sich in einer „entmystifizierenden“ Begriffsbestimmung und -abgrenzung.
Wagener, Andreas (2022)
Hofer Beiträge zur digitalen Transformation, Okt. 2022.
DOI: 10.57944/1051-131
Wagener, Andreas (2022)
Hofer Beiträge zur digitalen Transformation (September 2022).
DOI: 10.57944/1051-130
Neff, Michaela; Storf, Holger; Vasseur, Jessica; Scheidt, Jörg; Zerr, Thomas; Khouri, Andreas; Schaaf, Jannik (2022)
Neff, Michaela; Storf, Holger; Vasseur, Jessica; Scheidt, Jörg; Zerr, Thomas...
Orphanet Journal of Rare Diseases 2022 17, 357.
DOI: 10.1186/s13023-022-02514-3
Dreissig, Felix; Röckl, Jonas; Müller, Tilo (2022)
Proceedings of the 17th International Conference on Availability, Reliability and Security (ARES 2022), 1-10.
DOI: 10.1145/3538969.3538972
To optimally utilize Intel SGX, programs must be partitioned into trusted and untrusted parts. Writing the trusted part of a program with Intel’s SDK, however, requires manual effort that often becomes an obstacle for programmers. In this work, we investigate how compiler-level tooling can assist with the semi-automatic separation of code into a trusted and an untrusted partition. We present Cadote, a solution that generates SGX enclaves from programs written in Rust. Application developers are expected to mark functions as trusted, for which enclaves are then generated automatically. All other functions remain untrusted and are executed outside Intel SGX in the normal world. We implemented this concept using compiler optimization passes of the LLVM framework. Targeting Rust as input language allows us to benefit from high-level concepts, such as memory safety, which enable us to safely copy function parameters between the normal and trusted world in practice.
Scharnagl, Bastian; Groth, Christian (2022)
5th International Conference on Artificial Intelligence for Industries (AI4I). 2022.
EEG classification is a promising approach to facilitate the life of handicapped people and to generate future human-computer-interfaces. In this paper we want to compare the effectiveness of current state of the art deep learning techniques for EEG classification. Therefore, we applied different approaches on various datasets and did a crosscomparison of the results in order to get more knowledge on the generalization capabilities. Additionally, we created a new EEG dataset and made it available for further research.
Atzenbeck, Claus; Rubart, Jessica (2022)
33rd ACM Conference on Hypertext and Social Media (HT'22).
DOI: 10.1145/3538882
Human Factors in Hypertext 2022 (HUMAN'22) is the 5th workshop in this series. It is sponsored by ACM SIGWEB and is associated to the ACM Conference on Hypertext and Social Media 2022 (HT'22), which takes place between June 28th and July 1st in Barcelona, Spain as a hybrid event. HUMAN'22 takes place on June 28th—the conference's workshop day.
After two years of pandemic-caused virtual workshops, HUMAN'22 is organized as a hybrid event, which is in line with the organization of the main conference. We see this as a chance to allow in-presence meetings while providing remote participants the opportunity to get in touch by low registration costs and a reduced carbon footprint. Today's digital media enables us to communicate over distance or even attend larger meetings online and the Corona pandemic has taught us to use these tools in our daily life. This puts a special focus on the role of hypertext in our communication and information exchange demands, in particular from a human's perspective.
Schiller, Katharina; Adamsky, Florian (2022)
11th International Workshop on Socio-Technical Aspects in Security affiliated with the 26th European Symposium on Research in Computer Security (ESORICS 2021), 182-193.
DOI: 10.1007/978-3-031-10183-0_9
E-mail is nearly 50 years old and is still one of the most used communication protocols nowadays. However, it has no support for End-to-end encryption (E2EE) by default, which makes it inappropriate for sending sensitive information. This is why two e-mail encryption standards have been developed—namely, Secure/Multipurpose Internet Mail Extensions (S/MIME) and OpenPGP. Previous studies found that bad usability of encryption software can lead to software that is incorrectly used or not at all. Both consequences have a fatal impact on users’ security and privacy. In recent years, the number of e-mails that are read and written on mobile devices has increased drastically. In this paper, we conduct to the best of our knowledge, the first usability study of e-mail encryption apps on smartphones. We tested two mobile apps, one uses OpenPGP on Android and one uses S/MIME on iOS. In our usability study, we tested both apps with eleven participants and evaluated the usability with the System Usability Scale (SUS) and the Short Version of User Experience Questionnaire (UEQ-S). Our study shows that both apps have several usability issues which partly led to unencrypted e-mails and participants sending their passphrase instead of their public key.
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