TY - JOUR A1 - Langendörfer, Peter A1 - Methfessel, Michael A1 - Frankenfeldt, Horst A1 - Babanskaja, Irina A1 - Matthaei, Irina A1 - Kraemer, Rolf T1 - Shielding TCP from Wireless Link Errors: Retransmission Effort and Fragmentation Y1 - 2002 ER - TY - GEN A1 - Branki, C. A1 - Cross, B. A1 - Diaz, G. A1 - Langendörfer, Peter A1 - Laux, F. A1 - Ortiz, G. A1 - Randles, M. A1 - Taleb-Bendiab, A. A1 - Teuteberg, F. A1 - Unland, R. A1 - Wanner, G. T1 - Techniques and Applications for Mobile Commerce Y1 - 2008 SN - 978-1-58603-826-7 PB - Amsterdam : IOS Press ER - TY - GEN A1 - Harju, J. A1 - Heijenk, G. A1 - Langendörfer, Peter A1 - Siris, V. A. T1 - Wired / Wireless Internet Communications Y1 - 2008 SN - 978-3-540-68805-1 PB - Springer CY - Berlin ER - TY - BOOK A1 - Shen, S. A1 - Lin, C. A1 - Sun, Yaoming A1 - Pan, J. A1 - Langendörfer, Peter A1 - Cao, Z. T1 - Wireless Network Security Y1 - 2006 SN - 1530-8669 PB - Wiley ER - TY - RPRT A1 - Langendörfer, Peter A1 - Piotrowski, Krzysztof A1 - Panic, Goran A1 - Sojka, A. A1 - Grilo, Antonio A1 - Barreiros d'Almeida Pereira, P. R. T1 - Specification and Testing of the Secure Middleware Architecture with an Energy Management System Y1 - 2011 ER - TY - RPRT A1 - Piotrowski, Krzysztof A1 - Langendörfer, Peter A1 - Castelluccia, C. A1 - Westhoff, D. T1 - Specification of an IDS Scheme and Secure Code Attestation Protocol for WSAN Y1 - 2011 ER - TY - PAT A1 - Dietterle, Daniel A1 - Langendörfer, Peter T1 - Protokollbeschleunigermodul mit Paketweiterleitungsfunktion und Betriebsverfahren für einen Senderempfänger zur schnellen Weiterleitung von Datenpaketen Y1 - 2010 ER - TY - RPRT A1 - Piotrowski, Krzysztof A1 - Langendörfer, Peter A1 - Kornemann, Stephan T1 - Implementation of an IDS Scheme and Secure Code Attestation Protocol for WSAN Y1 - 2011 ER - TY - RPRT A1 - Vater, Frank A1 - Langendörfer, Peter A1 - Basmer, Thomas A1 - Stecklina, Oliver T1 - User Manual Trusted Sensor Node Y1 - 2010 ER - TY - RPRT A1 - Tuinenbreijer, K. A1 - Marchesani, R. A1 - Langendörfer, Peter A1 - Dallas, A. A1 - Leligou, N. A1 - Redondo, L. A1 - Torre, E. de la A1 - Lippert, P. A1 - Berekovic, M. T1 - Set of Representative WSN Application Domains Y1 - 2009 ER - TY - RPRT A1 - Langendörfer, Peter A1 - Hiebel, St. A1 - Maaser, Michael A1 - Nowak, St. T1 - Djamal-Eddine Meddour: OMEGA common semantic, Deliverable 5.1, 2008 Y1 - 2008 ER - TY - PAT A1 - Langendörfer, Peter A1 - Maaser, Michael T1 - Geschütztes Ausführen einer Datenverarbeitungsanwendung eines Diensteanbieters für einen Nutzer durch eine vertrauenswürdige Ausführungsumgebung Y1 - 2007 ER - TY - RPRT A1 - Langendörfer, Peter A1 - Maaser, Michael T1 - White Paper WG5 Services and Applications: Middleware Platforms for Heterogeneous Distributed Systems Y1 - 2007 ER - TY - RPRT A1 - Westhoff, D. A1 - Langendörfer, Peter A1 - Piotrowski, Krzysztof A1 - Poschmann, A. T1 - Specification, Implementation and Simulation of Secure Distributed Data Storage Y1 - 2006 ER - TY - PAT A1 - Langendörfer, Peter A1 - Dyka, Zoya T1 - Area Efficient Hardware Implementation of Elliptic Curve Cryptography by Iteratively Applying Karatsuba's Method Y1 - 2005 ER - TY - PAT A1 - Falck, T. A1 - Maass, H. A1 - Weidenhaupt, K. A1 - Langendörfer, Peter T1 - Verfahren zum schrittweisen Austausch persönlicher Informationen in non-trusted Peer-to-Peer Umgebungen Y1 - 2004 ER - TY - RPRT A1 - Dyka, Zoya A1 - Vater, Frank A1 - Maye, Oliver A1 - Langendörfer, Peter A1 - Kraemer, Rolf T1 - Efficient Implementations of Cryptographic Routines - A Review and Performance Analysis of Various Approaches Y1 - 2004 ER - TY - GEN A1 - Alsabbagh, Wael A1 - Amogbonjaye, Samuel A1 - Urrego, Diego A1 - Langendörfer, Peter T1 - A Stealthy False Command Injection Attack on Modbus based SCADA Systems T2 - 20th Consumer Communications & Networking Conference (CCNC), (2023) N2 - Modbus is a widely-used industrial protocol in Supervisory Control and Data Acquisition (SCADA) systems for different purposes such as controlling remote devices, monitoring physical processes, data acquisition, etc. Unfortunately, such a protocol lacks security means i.e., authentication, integrity, and confidentiality. This has exposed industrial plants using the Modbus protocol and made them attractive to malicious adversaries who could perform various kinds of cyber-attacks causing significant consequences as Stuxnet showed. In this paper, we exploit the insecurity of the Modbus protocol and perform a stealthy false command injection scenario concealing our injection from the SCADA operator. Our attack approach is comprised of two main phases: 1) Pre-attack phase (offline) where an attacker sniffs, collects and stores sufficient valid request-response pairs in a database, 2) Attack phase (online) where the attacker performs false command injection and conceals his injection by replaying a valid response from his database upon each request sent from the HMI user. Such a scenario is quite severe and might cause disastrous damages in SCADA systems and critical infrastructures if it is successfully implemented by malicious adversaries. Finally, we suggest some appropriate mitigation solutions to prevent such a serious threat. KW - Performance evaluation KW - SCADA systems KW - Command Injection Attacks KW - Industrial plants Y1 - 2023 SN - 978-1-6654-9734-3 SN - 978-1-6654-9735-0 U6 - https://doi.org/10.1109/CCNC51644.2023.10059804 SN - 2331-9860 ER - TY - GEN A1 - Förster, Benjamin A1 - Langendörfer, Peter A1 - Hinze, Thomas T1 - Determining Distributions of Security Means for Wireless Sensor Networks based on the Model of a Neighbourhood Watch T2 - arXiv N2 - Neighbourhood watch is a concept that allows a community to distribute a complex security task in between all members. Members of the community carry out individual security tasks to contribute to the overall security of it. It reduces the workload of a particular individual while securing all members and allowing them to carry out a multitude of security tasks. Wireless sensor networks (WSNs) are composed of resource-constraint independent battery driven computers as nodes communicating wirelessly. Security in WSNs is essential. Without sufficient security, an attacker is able to eavesdrop the communication, tamper monitoring results or deny critical nodes providing their service in a way to cut off larger network parts. The resource-constraint nature of sensor nodes prevents them from running full-fledged security protocols. Instead, it is necessary to assess the most significant security threats and implement specialised protocols. A neighbourhood-watch inspired distributed security scheme for WSNs has been introduced by Langend\"orfer. Its goal is to increase the variety of attacks a WSN can fend off. A framework of such complexity has to be designed in multiple steps. Here, we introduce an approach to determine distributions of security means on large-scale static homogeneous WSNs. Therefore, we model WSNs as undirected graphs in which two nodes connected iff they are in transmission range. The framework aims to partition the graph into $n$ distinct security means resulting in the targeted distribution. The underlying problems turn out to be NP hard and we attempt to solve them using linear programs (LPs). To evaluate the computability of the LPs, we generate large numbers of random {\lambda}-precision unit disk graphs (UDGs) as representation of WSNs. For this purpose, we introduce a novel {\lambda}-precision UDG generator to model WSNs with a minimal distance in between nodes. Y1 - 2023 U6 - https://doi.org/10.48550/arXiv.2212.09050 ER - TY - GEN A1 - Förster, Benjamin A1 - Langendörfer, Peter A1 - Hinze, Thomas T1 - Novel Approach to a Plant Inspired Distributed Security Scheme for Wireless Sensor Networks T2 - 12th Mediterranean Conference on Embedded Computing (MECO), Budva, Montenegro, 2023 N2 - Energy efficiency is a key factor for the longevity of wireless sensor networks (WSNs). Most representatives of the plants have evolved to be highly energy-efficient in their survival strategies, despite their limited resources. Plants have to deal with a variety of threats originating from different herbivores and microbial pathogens while handling a number of abiotic stress factors. For plants and WSNs, different defence mechanisms impose different fitness costs and therefore the costs and benefits have to be well-balanced. This way, plants are able to not only conquer a large variety of different attacks but also handle several different simultaneous attacks adequately. To react early and adapt to upcoming threats, plants within a network are capable of signalling each other within a certain distance about ongoing attacks. The biological strategies of plants in terms of signalling and defence, as well as their energy and resource limitations, share significant similarities with WSNs. This study aims to explore these similarities and demonstrates the correspondence between the biological concepts and WSNs. Additionally, we present a novel approach to enhancing security in WSNs through a cooperative distributed security scheme inspired by key factors of plant defence mechanisms, with the goal of reducing the energy constraints and maximising the longevity of the network. KW - Wireless sensor networks KW - Pathogens KW - Embedded computing KW - Cyber-physical systems Y1 - 2023 SN - 979-8-3503-2291-0 SN - 979-8-3503-2290-3 U6 - https://doi.org/10.1109/MECO58584.2023.10154949 SN - 2637-9511 ER -