TY  - JOUR
A1  - Grum, Marcus
A1  - Bender, Benedict
A1  - Alfa, A. S.
A1  - Gronau, Norbert
T1  - A decision maxim for efficient task realization within analytical network infrastructures
JF  - Decision support systems : DSS ; the international journal
N2  - Faced with the increasing needs of companies, optimal dimensioning of IT hardware is becoming challenging for decision makers. In terms of analytical infrastructures, a highly evolutionary environment causes volatile, time dependent workloads in its components, and intelligent, flexible task distribution between local systems and cloud services is attractive. With the aim of developing a flexible and efficient design for analytical infrastructures, this paper proposes a flexible architecture model, which allocates tasks following a machine-specific decision heuristic. A simulation benchmarks this system with existing strategies and identifies the new decision maxim as superior in a first scenario-based simulation.
KW  - Analytics
KW  - Architecture concepts
KW  - Cyber-physical systems
KW  - Internet of things
KW  - Task realization strategies
KW  - Simulation
Y1  - 2018
U6  - https://doi.org/10.1016/j.dss.2018.06.005
SN  - 0167-9236
SN  - 1873-5797
VL  - 112
SP  - 48
EP  - 59
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Krentz, Konrad-Felix
A1  - Meinel, Christoph
T1  - Denial-of-sleep defenses for IEEE 802.15.4 coordinated sampled listening (CSL)
JF  - Computer Networks
N2  - Coordinated sampled listening (CSL) is a standardized medium access control protocol for IEEE 80215.4 networks. Unfortunately, CSL comes without any protection against so-called denial-of-sleep attacks. Such attacks deprive energy-constrained devices of entering low-power sleep modes, thereby draining their charge. Repercussions of denial-of-sleep attacks include long outages, violated quality-of-service guarantees, and reduced customer satisfaction. However, while CSL has no built-in denial-of-sleep defenses, there already exist denial-of-sleep defenses for a predecessor of CSL, namely ContikiMAC. In this paper, we make two main contributions. First, motivated by the fact that CSL has many advantages over ContikiMAC, we tailor the existing denial-of-sleep defenses for ContikiMAC to CSL. Second, we propose several security enhancements to these existing denial-of-sleep defenses. In effect, our denial-of-sleep defenses for CSL mitigate denial-of-sleep attacks significantly better, as well as protect against a larger range of denial-of-sleep attacks than the existing denial-of-sleep defenses for ContikiMAC. We show the soundness of our denial-of-sleep defenses for CSL both analytically, as well as empirically using a whole new implementation of CSL. (C) 2018 Elsevier B.V. All rights reserved.
KW  - Internet of things
KW  - Link layer security
KW  - MAC security
KW  - Denial of sleep
Y1  - 2018
U6  - https://doi.org/10.1016/j.comnet.2018.10.021
SN  - 1389-1286
SN  - 1872-7069
VL  - 148
SP  - 60
EP  - 71
PB  - Elsevier
CY  - Amsterdam
ER  -