TY  - JOUR
A1  - Prantl, Thomas
A1  - Zeck, Timo
A1  - Bauer, Andre
A1  - Ten, Peter
A1  - Prantl, Dominik
A1  - Yahya, Ala Eddine Ben
A1  - Ifflaender, Lukas
A1  - Dmitrienko, Alexandra
A1  - Krupitzer, Christian
A1  - Kounev, Samuel
T1  - A Survey on Secure Group Communication Schemes With Focus on IoT Communication
JF  - IEEE Access
N2  - A key feature for Internet of Things (IoT) is to control what content is available to each user. To handle this access management, encryption schemes can be used. Due to the diverse usage of encryption schemes, there are various realizations of 1-to-1, 1-to-n, and n-to-n schemes in the literature. This multitude of encryption methods with a wide variety of properties presents developers with the challenge of selecting the optimal method for a particular use case, which is further complicated by the fact that there is no overview of existing encryption schemes. To fill this gap, we envision a cryptography encyclopedia providing such an overview of existing encryption schemes. In this survey paper, we take a first step towards such an encyclopedia by creating a sub-encyclopedia for secure group communication (SGC) schemes, which belong to the n-to-n category. We extensively surveyed the state-of-the-art and classified 47 different schemes. More precisely, we provide (i) a comprehensive overview of the relevant security features, (ii) a set of relevant performance metrics, (iii) a classification for secure group communication schemes, and (iv) workflow descriptions of the 47 schemes. Moreover, we perform a detailed performance and security evaluation of the 47 secure group communication schemes. Based on this evaluation, we create a guideline for the selection of secure group communication schemes.
KW  - Internet of Things
KW  - encryption
KW  - secure group communication
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-300257
VL  - 10
SP  - 99944
EP  - 99962
ER  - 
TY  - JOUR
A1  - Oberdörfer, Sebastian
A1  - Heidrich, David
A1  - Birnstiel, Sandra
A1  - Latoschik, Marc Erich
T1  - Enchanted by Your Surrounding? Measuring the Effects of Immersion and Design of Virtual Environments on Decision-Making
JF  - Frontiers in Virtual Reality
N2  - Impaired decision-making leads to the inability to distinguish between advantageous and disadvantageous choices. The impairment of a person’s decision-making is a common goal of gambling games. Given the recent trend of gambling using immersive Virtual Reality it is crucial to investigate the effects of both immersion and the virtual environment (VE) on decision-making. In a novel user study, we measured decision-making using three virtual versions of the Iowa Gambling Task (IGT). The versions differed with regard to the degree of immersion and design of the virtual environment. While emotions affect decision-making, we further measured the positive and negative affect of participants. A higher visual angle on a stimulus leads to an increased emotional response. Thus, we kept the visual angle on the Iowa Gambling Task the same between our conditions. Our results revealed no significant impact of immersion or the VE on the IGT. We further found no significant difference between the conditions with regard to positive and negative affect. This suggests that neither the medium used nor the design of the VE causes an impairment of decision-making. However, in combination with a recent study, we provide first evidence that a higher visual angle on the IGT leads to an effect of impairment.
KW  - virtual reality
KW  - virtual environments
KW  - immersion
KW  - decision-making
KW  - iowa gambling task
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-260101
VL  - 2
ER  - 
TY  - RPRT
A1  - Savvidis, Dimitrios
A1  - Roth, Robert
A1  - Tutsch, Dietmar
T1  - Static Evaluation of a Wheel-Topology for an SDN-based Network Usecase
T2  - Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22)
N2  - The increased occurrence of Software-Defined-Networking (SDN) not only improves the dynamics and maintenance of network architectures, but also opens up new use cases and application possibilities. Based on these observations, we propose a new network topology consisting of a star and a ring topology. This hybrid topology will be called wheel topology in this paper. We have considered the static characteristics of the wheel topology and compare them with known other topologies.
KW  - Datennetz
KW  - SDN
KW  - topology
KW  - wheel
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-280715
ER  -