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Musick, Geoff (author), Duan, Wen (author), Najafian, S. (author), Sengupta, Subhasree (author), Flathmann, Christopher (author), Knijnenburg, Bart (author), McNeese, Nathan (author)Newly-formed teams often encounter the challenge of members coming together to collaborate on a project without prior knowledge of each other’s working and communication styles. This lack of familiarity can lead to conflicts and misunderstandings, hindering effective teamwork. Derived from research in social recommender systems, team...journal article 2024
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Grataloup, Albin (author), Jonas, Stefan (author), Meyer, A. (author)Federated learning has recently emerged as a privacy-preserving distributed machine learning approach. Federated learning enables collaborative training of multiple clients and entire fleets without sharing the involved training datasets. By preserving data privacy, federated learning has the potential to overcome the lack of data sharing in...review 2024
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Kurteva, A.K. (author), Pandit, Harshvardhan J. (author)Protecting and preserving individuals’ personal data is a legal obligation set out by the European Union’s General Data Protection Regulation (GDPR). However, the process of implementing data governance to support that, in a decentralised ecosystem, is still vague. Motivated by the need for lawful decentralised data processing, this paper...conference paper 2023
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El-Zawawy, Mohamed A. (author), Lal, C. (author), Conti, M. (author)With the rapid technological advancement in the Internet of Things (IoT) and Internet of Vehicles (IoV), we witness exponential growth of Connected and Autonomous Vehicles (CAVs). However, these integrations of IoV with other technologies make the IoV network and its interaction between different network components highly complex. Therefore,...journal article 2023
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Cardaioli, Matteo (author), Conti, M. (author), Orazi, Gabriele (author), Tricomi, Pier Paolo (author), Tsudik, Gene (author)Authentication and de-authentication phases should occur at the beginning and end of secure user sessions, respectively. A secure session requires the user to pass the former, but the latter is often underestimated or ignored. Unattended or dangling sessions expose users to well-known Lunchtime Attacks. To mitigate this threat, researchers...journal article 2023
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Ding, Aaron Yi (author), van den Boogert, R.J. (author)With rising numbers of people living in cities leading to increasing congestion and pollution, mobile crowdsensing applications form a potential solution to make transport systems smarter and more efficient. However, sharing data comes with the risk of private information being disclosed. Therefore, a clear incentive is necessary to motivate...journal article 2023
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Chiasson, David (author), Lin, Yuan (author), Kok, M. (author), Shull, Peter (author)Hyperbolic localization measures the time difference of arrivals (TDOAs) of signals to determine the location of a wireless source or receiver. Traditional methods depend on precise clock synchronization between nodes so that time measurements from independent devices can be meaningfully compared. Imperfect synchronization is often the dominant...journal article 2023
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Wang, Wei (author), Liu, Dongli (author), Xu, Peng (author), Yang, Laurence Tianruo (author), Liang, K. (author)It has become a trend for clients to outsource their encrypted databases to remote servers and then leverage the Searchable Encryption technique to perform secure data retrieval. However, the method has yet to be considered a crucial need for replication on searchable encrypted data. It calls for challenging works on Dynamic Searchable...journal article 2023
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Memar Zahedani, Armin (author), Vos, J.V. (author), Erkin, Z. (author)Double auctions are procedures to trade commodities such as electricity or parts of the wireless spectrum at optimal prices. Buyers and sellers inform the auctioneer what quantity they want to buy or sell at specific prices. The auctioneer aggregates these offers into demand and supply curves and finds the intersection representing the...conference paper 2023
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Wang, Lili (author), Lin, Ye (author), Yao, Ting (author), Xiong, Hu (author), Liang, K. (author)Existing proxy re-encryption (PRE) schemes to secure cloud data sharing raise challenges such as supporting the heterogeneous system efficiently and achieving the unbounded feature. To address this problem, we proposed a fast and secure unbounded cross-domain proxy re-encryption scheme, named FABRIC, which enables the delegator to authorize...journal article 2023
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Li, Meng (author), Chen, Yifei (author), Zhu, Liehaung (author), Zhang, Zijian (author), Ni, Jianbing (author), Lal, C. (author), Conti, M. (author)Many regions are in urgent need of facial masks for slowing down the spread of COVID-19. To fight the pandemic, people are contributing masks through donation systems. Most existing systems are built on a centralized architecture which is prone to the single point of failure and lack of transparency. Blockchain-based solutions neglect...journal article 2023
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Gordijn, Daan (author), Kromes, R.G. (author), Giannetsos, Thanassis (author), Liang, K. (author)This work aims to provide a more secure access control in Hyperledger Fabric blockchain by combining multiple ID’s, attributes, and policies with the components that regulate access control. The access control system currently used by Hyperledger Fabric is first completely analyzed. Next, a new implementation is proposed that builds upon the...conference paper 2023
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Bardi, Sara (author), Conti, M. (author), Pajola, L. (author), Tricomi, Pier Paolo (author)Social Honeypots are tools deployed in Online Social Networks (OSN) to attract malevolent activities performed by spammers and bots. To this end, their content is designed to be of maximum interest to malicious users. However, by choosing an appropriate content topic, this attractive mechanism could be extended to any OSN users, rather than...conference paper 2023
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- Ofe, H.A. (author), Sandberg, Johan (author), Rudmark, Daniel (author), de Reuver, Mark (author) conference paper 2023
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Pascoal, Túlio (author), Decouchant, Jérémie (author), Völp, Marcus (author)Genome-wide association studies (GWAS) identify correlations between the genetic variants and an observable characteristic such as a disease. Previous works presented privacy-preserving distributed algorithms for a federation of genome data holders that spans multiple institutional and legislative domains to securely compute GWAS results....conference paper 2022
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Wu, Han (author), Zhao, Z. (author), Chen, Lydia Y. (author), van Moorsel, Aad (author)Federated Learning (FL) has emerged as a potentially powerful privacy-preserving machine learning method-ology, since it avoids exchanging data between participants, but instead exchanges model parameters. FL has traditionally been applied to image, voice and similar data, but recently it has started to draw attention from domains including...conference paper 2022
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Li, Meng (author), Chen, Yifei (author), Lal, C. (author), Conti, M. (author), Martinelli, Fabio (author), Alazab, Mamoun (author)Security and privacy issues have become a major hindrance to the broad adoption of Ride-Hailing Services (RHSs). In this article, we introduce a new collusion attack initiated by the Ride-Hailing Service Provider (RHSP) and a driver that could easily link the real riders and their anonymous requests (credentials). Besides this attack,...journal article 2022
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Xu, Weitao (author), Xue, Wanli (author), Lin, Qi (author), Lan, G. (author), Feng, Xingyu (author), Wei, Bo (author), Luo, Chengwen (author), Li, Wei (author), Zomaya, Albert Y. (author)Smart space has emerged as a new paradigm that combines sensing, communication, and artificial intelligence technologies to offer various customized services. A fundamental requirement of these services is person identification. Although a variety of person-identification approaches has been proposed, they suffer from several limitations in...journal article 2022
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Li, Qiongxiu (author), Heusdens, R. (author), Christensen, M.T. (author)Privacy issues and communication cost are both major concerns in distributed optimization in networks. There is often a trade-off between them because the encryption methods used for privacy-preservation often require expensive communication overhead. To address these issues, we, in this paper, propose a quantization-based approach to achieve...journal article 2022
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Cardaioli, Matteo (author), Conti, M. (author), Tricomi, Pier Paolo (author), Tsudik, Gene (author)Ideally, secure user sessions should start and end with authentication and de-Authentication phases, respectively. While the user must pass the former to start a secure session, the latter's importance is often ignored or underestimated. Dangling or unattended sessions expose users to well-known Lunchtime Attacks. To mitigate this threat, the...conference paper 2022