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32nd International Conference on Software, Telecommunications and Computer Networks, SoftCOM 2024

作者： McDougall, Johanna Ansohn Brighente, Alessandro Kunstmann, Anne Zapatka, Niklas Schambach, Hanna Federrath, Hannes University of Hamburg Security in Distributed Systems Hamburg Germany University of Padova Department of Mathematics Padua Italy

ISBN: (纸本)9789532901382

Active scanning via probe requests is a means for mobile devices to detect known networks. To protect the device from being tracked via an unchanging identifier contained in the probe request, MAC address randomisation is used. While it has been in use since 2014, the standardisation of MAC address randomisation is still in its draft stage. This also leads to manufacturers devising their own randomisation schemes, some of which have been proven insufficient to prevent tracking. In this paper, we strive to reignite the discussion on standardising the use of Locally Administered Addresses (LAAs) like randomised MAC addresses. To overcome the limitations of MAC address randomisation, we propose the use of one generic address over all devices. We implement and test this scheme, and additionally ascertain that a generic MAC address not only enhances user anonymity during probing but also offers operational efficiency comparable to MAC address randomisation. In conclusion, this contribution highlights the need for a standardised approach to preserve device anonymity, and simultaneously introduces a novel alternative of employing a single generic address across devices. © 2024 University of Split, FESB.

关键词： Probes

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A Multi-Tenancy System Architecture for Online Examinations 36

A Multi-Tenancy System Architecture for Online Examinations

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36th IEEE/IFIP Network Operations and Management Symposium, NOMS 2023

作者： Andre, Jonas Naab, Johannes Jaeger, Benedikt Carle, Georg Seidlitz, Leander Günther, Stephan Network Architectures and Services Germany Distributed Systems and Security School of Computation Information and Technology Germany

ISBN: (纸本)9781665477161

Time-synchronous online examinations pose new demands on our infrastructure: lectures with more than 1000 students are common at TUM, and in case of time-synchronous examinations students concurrently download working instructions or submit solutions - with possibly multiple such examinations being conducted at the same time. Furthermore, the architecture has to withstand students that impatiently reload the download page multiple times as well as the sudden increase in traffic at the start and end of an exam. In addition, the architecture has to be resilient against both deliberate attacks of individuals and handling of unsuspecting *** this paper we discuss our implementation of an examination management platform as multi-tenancy system based on operational requirements, demands on scalability, and bottlenecks we encountered in our attempt to roll out the infrastructure for as many examinations as needed. © 2023 IEEE.

关键词： Students

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Unveiling the Black Box: Neural Cryptanalysis with XAI

Unveiling the Black Box: Neural Cryptanalysis with XAI

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2024 IEEE International Conference on systems, Man, and Cybernetics, SMC 2024

作者： Goi, Yue-Tian Leong, Shu-Min Phan, Raphael C.-W. Lai, Shangqi Salagean, Ana School of Information Technology Monash University Australia CSIRO's Data61 Distributed Systems Security Group Australia Loughborough University Department of Computer Science United Kingdom

ISBN: (纸本)9781665410205

At CRYPTO'19, Gohr[1] presented ResNet-based neural distinguishers (ND) for the round-reduced SPECK32/64 cipher. However, due to the black-box use of such deep learning models, it is hard for humans to understand why these distinguishers work, impeding advancements in cryptanalytic knowledge. In this work, we aim to effectively adapt eXplainable Artificial Intelligence (XAI) techniques, notably Local Interpretable Model-Agnostic Explanations (LIME) and Shapley Additive Explanations (SHAP), to gain a detailed understanding of the important features useful in Gohr's neural distinguishers. © 2024 IEEE.

关键词： Ciphertext

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Algorithm for Determining the Safety Functions of a Dynamic Technical System and the Concept of Their Presentation on the Safety Monitor

Algorithm for Determining the Safety Functions of a Dynamic ...

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2024 International Russian Automation Conference, RusAutoCon 2024

作者： Jharko, Elena Abdulova, Ekaterina V.A. Trapeznikov Institute of Control Sciences of the Russian Academy of Sciences Laboratory of Distributed Information Analytical and Control Systems Moscow Russia V.A. Trapeznikov Institute of Control Sciences of the Russian Academy of Sciences Laboratory of Security of Complex Systems Moscow Russia

The paper discusses approaches to ensuring the safety of dynamic technical systems, focusing on developing and implementing an algorithm for determining safety functions. The paper's primary goal is to create a reliable and effective monitoring system that will allow timely identification and prevention of potential threats and ensure real-time technical systems' stability and correct operation. The work proposes a concept for presenting safety functions on a safety monitor, which provides operators with an intuitive interface for managing and analyzing data. The authors achieve improved automated control and rapid response to emergency situations by using algorithmic solutions and visualization methods. The work provides examples of the influence of system parameters on the generalized safety function. The paper's results demonstrate ways to increase reliability and safety in the operation of dynamic technical systems. © 2024 IEEE.

关键词： dynamic technical system safety functions safety monitor

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Probing with a Generic MAC Address: An Alternative to MAC Address Randomisation

Probing with a Generic MAC Address: An Alternative to MAC Ad...

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International Conference on Software, Telecommunications and Computer Networks (SoftCOM)

作者： Johanna Ansohn McDougall Alessandro Brighente Anne Kunstmann Niklas Zapatka Hanna Schambach Hannes Federrath Security in Distributed Systems University of Hamburg Hamburg Germany Department of Mathematics University of Padova Padua Italy

ISBN: (数字)9789532901382

ISBN: (纸本)9798350354614

关键词： Drives Software Mobile handsets Hardware Computer networks Telecommunications Object recognition Probes

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Let me quickly share it - Time Pressure when Sharing on Social Media 24

Let me quickly share it - Time Pressure when Sharing on Soci...

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23rd International Conference on Mobile and Ubiquitous Multimedia, MUM 2024

作者： Panskus, Rebecca Tanni, Tangila Islam Ponticello, Alexander Meissner, Echo Solihin, Yan Krombholz, Katharina Marky, Karola Ruhr University Bochum Bochum Germany Department of Computer Science University of Central Florida Orlando United States CISPA Helmholtz Center for Information Security Saarland University Germany Saarbrücken Germany Institute of Distributed Systems Ulm University Ulm Germany CISPA Helmholtz Center for Information Security Saarbrücken Germany

ISBN: (纸本)9798400712838

Photo sharing has become an integral part of social media;many new platforms even prompt their users to share photos under time pressure. Yet, sharing photos can also affect the privacy of individuals in a negative way. In this paper, we investigate the factor of time pressure when sharing on social media in relation to target audiences and photo content. For this, we conducted an online study (N=195) where we simulated time-pressured sharing scenarios with photos containing different sorts of content, including private information and unfamiliar bystanders. Among our results, we show that time pressure can impact sharing decisions even though this is not consciously considered by users. Additionally, we confirm the influence of non-privacy-related influence factors like trust towards the target audience, photo aesthetics, and connection with others. Based on our results, we discuss design implications for photo-sharing prompts to better protect private information and bystanders in social media photos. © 2024 Copyright held by the owner/author(s).

关键词： Social Media

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You Are as You Type: Investigating the Influence of Timestamp Accuracy on the Robustness of Keystroke Biometrics

You Are as You Type: Investigating the Influence of Timestam...

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IEEE International Conference on Trust, security and Privacy in Computing and Communications (TrustCom)

作者： Florian Dehling Sebastian Koch Luigi Lo Iacono Hannes Federrath Institute of Computer Science University of Giessen Giessen Germany Security in Distributed Systems University of Hamburg Hamburg Germany

ISBN: (数字)9798331506209

ISBN: (纸本)9798331506216

Keystroke dynamics are behavioral biometric traits that are frequently proposed to be used in novel authentication systems. Keystroke dynamics are based on the analysis of intervals between keystroke events originating from user input and thus directly depend on available timing information. However, modern web browsers limit the accuracy of timestamps to improve security and privacy. This study systematically investigates the impact of limited timestamp accuracies on the performance of keystroke dynamic analysis. By conducting multiple experiments with popular web browsers, we demonstrate that the minor timestamp modifications that mitigate timing side-channel attacks do not interfere with the effectiveness of keystroke dynamics analysis algorithms. Furthermore, they are surprisingly resilient to larger timestamp modifications, which results in a serious threat to users’ privacy. This research provides fundamental knowledge enabling researchers, privacy engineers, and browser vendors to study risks in keystroke dynamics-related systems and to develop mitigations against tracking methods that fingerprint users instead of devices or browsers.

关键词： Privacy Accuracy Prevention and mitigation Keystroke dynamics Authentication Side-channel attacks Robustness Browsers Timing security

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CAIBA: Multicast Source Authentication for CAN Through Reactive Bit Flipping

arXiv

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arXiv 2025年

作者： Wagner, Eric Basels, Frederik Bauer, Jan Zimmermann, Till Wehrle, Klaus Henze, Martin Cyber Analysis & Defense Fraunhofer FKIE United States Communication and Distributed Systems RWTH Aachen University Germany Distributed Systems Group Osnabrück University Germany Security and Privacy in Industrial Cooperation RWTH Aachen University Germany

—Controller Area Networks (CANs) are the backbone for reliable intra-vehicular communication. Recent cyberattacks have, however, exposed the weaknesses of CAN, which was designed without any security considerations in the 1980s. Current efforts to retrofit security via intrusion detection or message authentication codes are insufficient to fully secure CAN as they cannot adequately protect against masquerading attacks, where a compromised communication device, a so-called electronic control units, imitates another device. To remedy this situation, multicast source authentication is required to reliably identify the senders of messages. In this paper, we present CAIBA, a novel multicast source authentication scheme specifically designed for communication buses like CAN. CAIBA relies on an authenticator overwriting authentication tags on-the-fly, such that a receiver only reads a valid tag if not only the integrity of a message but also its source can be verified. To integrate CAIBA into CAN, we devise a special message authentication scheme and a reactive bit overwriting mechanism. We achieve interoperability with legacy CAN devices, while protecting receivers implementing the AUTOSAR SecOC standard against masquerading attacks without communication overhead or verification delays. © 2025, CC BY-NC-ND.

关键词： Network intrusion

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DMTP: Deadline-aware Multipath Transport Protocol

DMTP: Deadline-aware Multipath Transport Protocol

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IFIP Networking Conference

作者： Tony John Adrian Perrig David Hausheer OVGU Magdeburg Networks and Distributed Systems Lab Network Security Group ETH Zürich

Increasing demand for real-time applications such as teleoperation, remote control of a process, and live video streaming has led to the need for more efficient and reliable transport protocols that can satisfy strict latency requirements. Emerging multipath communication can help to achieve such goals. However, existing multipath protocols, such as Multipath TCP and Multipath QUIC fall short on real-time applications, as they rely on retransmissions and congestion control, leading to higher latencies on lossy links. This paper proposes DMTP, a new deadline-aware multipath transport protocol based on the SCION Internet architecture to support real-time applications with strict latency requirements. Our evaluations show that DMTP outperforms Multipath TCP and Multipath QUIC over lossy links by more than 40% in terms of the number of packets transferred within their deadline when the loss rate is above 2%.

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Intellectualized Operator Information Support System for NPP: Expert systems and Dynamic Models

Intellectualized Operator Information Support System for NPP...

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2024 International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2024

作者： Jharko, Elena Chernyshov, Kirill Abdulova, Ekaterina Laboratory Of Distributed Information Analytical And Control Systems V.A. Trapeznikov Institute Of Control Sciences Of The Russian Academy Of Sciences Moscow Russia Laboratory Of Identification Of Control Systems V.A. Trapeznikov Institute Of Control Sciences Of The Russian Academy Of Sciences Moscow Russia Laboratory Of Security Of Complex Systems V.A. Trapeznikov Institute Of Control Sciences Of The Russian Academy Of Sciences Moscow Russia

ISBN: (纸本)9798350395013

The article discusses an approach that combines expert systems and dynamic models in an intellectualized operator information support system (IOISS) for nuclear power plant units. The main goal of this approach is to provide operators with the most complete and accurate information for the efficient management of power units (PU). The main functions of the IOISS of NPP PUs are highlighted, and a path is proposed for their full-scale implementation based on the use of predictive dynamic modeling of PU parameters and expert systems (ES). The use of predictive dynamic modeling makes it possible to predict the behavior of a power unit based on available data and calculate optimal control parameters. ES, in turn, provides expert knowledge and specialist experience, allowing operators to make informed decisions and respond to possible emergencies. The structure of the ES, which is part of the IOISS and includes modules for data analysis, decision-making, and information visualization, is considered. All these components work together to ensure the efficient and reliable operation of NPPs. This approach to IOISS is the basis for developing upper-level systems for instrumentation and control systems of NPPs. It can significantly improve the safety and efficiency of power units and simplify operators' decision-making process. © 2024 IEEE.

关键词： Nuclear fuels

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