Articles

 

Recent Submissions

  • Privacy-Enhanced Television Audience Measurements 

    Drosatos, George; Tasidou, Aimilia; Efraimidis, Pavlos S. (2017-02)
    Internet-enabled television systems (SmartTVs) are a development that introduces these devices into the interconnected environment of the Internet of Things. We propose a privacy-preserving application for computing ...

  • Integrated visualisation of wearable sensor data and risk models for individualised health monitoring and risk assessment to promote patient empowerment 

    Zhao, Youbing; Parvinzamir, Farzad; Wilson, Stephen; Wei, Hui; Deng, Zhikun; Portokallidis, Nick; Third, Allan; Drosatos, George; Liu, Enjie; Dong, Feng; Marozas, Vaidotas; Lukosevicius, Arunas; Kaldoudi, Eleni; Clapworthy, Gordon (Springer Link, 2017-05)
    Patient empowerment delivers health and social care services that enable people to gain more control of their healthcare needs. With the advancement of sensor technologies, it is increasingly possible to monitor people’s ...

  • A Privacy-by-Design Contextual Suggestion System for Tourism 

    Efraimidis, Pavlos S.; Drosatos, George; Arampatzis, Avi; Stamatelatos, Giorgos; Athanasiadis, Ioannis N. (MDPI, 2016-05-05)
    We focus on personal data generated by the sensors and through the everyday usage of smart devices and take advantage of these data to build a non-invasive contextual suggestion system for tourism. The system, which we ...

  • Versatile Query Scrambling for Private Web Search 

    Arampatzis, Avi; Drosatos, George; Efraimidis, Pavlos S. (Springer Link, 2015-05-16)
    We consider the problem of privacy leaks suffered by Internet users when they perform web searches, and propose a framework to mitigate them. In brief, given a ‘sensitive’ search query, the objective of our work is to ...

  • User-Centric Privacy-Preserving Statistical Analysis of Ubiquitous Health Monitoring Data 

    Drosatos, George; Efraimidis, Pavlos S. (ComSIS Consortium, 2014)
    In this paper, we propose a user-centric software architecture for managing Ubiquitous Health Monitoring Data (UHMD) generated from wearable sensors in a Ubiquitous Health Monitoring System (UHMS), and examine how these ...

  • An efficient privacy-preserving solution for finding the nearest doctor 

    Drosatos, George; Efraimidis, Pavlos S. (Personal and Ubiquitous Computing volume, 2012-10-30)
    In this work, we define the Nearest Doctor Problem for finding the nearest doctor in case of an emergency and present a privacy-preserving protocol for solving it. The solution is based on cryptographic primitives and makes ...

  • Privacy-preserving computation of participatory noise maps in the cloud 

    Drosatos, George; Efraimidis, Pavlos S.; Athanasiadis, Ioannis N.; Stevens, Matthias; D’Hondt, Ellie (Elsevier Ltd., 2014-06)
    This paper presents a privacy-preserving system for participatory sensing, which relies on cryptographic techniques and distributed computations in the cloud. Each individual user is represented by a personal software ...

  • A query scrambler for search privacy on the internet 

    Arampatzis, Avi; Efraimidis, Pavlos S.; Drosatos, George (Springer Link, 2012-10-09)
    We propose a method for search privacy on the Internet, focusing on enhancing plausible deniability against search engine query-logs. The method approximates the target search results, without submitting the intended query ...

  • Revealing the political affinity of online entities through their Twitter followers 

    Stamatelatos, Giorgos; Gyftopoulos, Sotirios; Drosatos, George; Efraimidis, Pavlos S. (Elsevier Ltd., 2020-03)
    In this work, we show that the structural features of the Twitter online social network can divulge valuable information about the political affinity of the participating nodes. More precisely, we show that Twitter followers ...

  • A probabilistic semantic analysis of eHealth scientific literature 

    Drosatos, George; Kaldoudi, Eleni (Sage Journals, 2019-05-12)
    Introduction: eHealth emerged as an interdisciplinary research area about 70 years ago. This study employs probabilistic techniques to semantically analyse scientific literature related to the field of eHealth in order to ...

  • A Blockchain-Based Platform for Consent Management of Personal Data Processing in the IoT Ecosystem 

    Rantos, Konstantinos; Drosatos, George; Kritsas, Antonios; Ilioudis, Christos; Papanikolaou, Alexandros; Filippidis, Adam P. (Wiley, 2019-10-17)
    A signifcant proportion of Internet of Tings (IoT) devices, which according to published reports will be more than 75 billion by 2025 [1], will soon surround users and will collect data that are likely to threaten users’ ...

  • Blockchain Applications in the Biomedical Domain: A Scoping Review 

    Drosatos, George; Kaldoudi, Eleni (Computational and Structural Biotechnology Journal, 2019)
    Blockchain is a distributed, immutable ledger technology introduced as the enabling mechanism to support cryptocurrencies. Blockchain solutions are currently being proposed to address diverse problems in different domains. ...

  • Enabling Responsible Online Gambling by Real-time Persuasive Technologies 

    Drosatos, George; Nalbadis, Fotis; Arden-Close, Emily; Baines, Victoria; Bolat, Elvira; Vuillier, Laura; Kostoulas, Theodoros; Budka, Marcin; Wasowska, Sonia; Bonello, Maris; Brown, Jamie; Corner, Tessa; McAlaney, John; Phalp, Keith; Ali, Raian (RTU Press, 2019-01)
    Online gambling, unlike other offline addiction forms, provides unprecedented opportunities for monitoring users’ behaviour in real-time, along with the ability to adapt persuasive interactions and messages that would match ...

  • A Blockchain-Based Notarization Service for Biomedical Knowledge Retrieval 

    Kleinaki, Athina-Styliani; Mytis-Gkometh, Petros; Drosatos, George; Efraimidis, Pavlos S.; Kaldoudi, Eleni (Elsevier Ltd., 2018-08)
    Biomedical research and clinical decision depend increasingly on scientific evidence realized by a number of au-thoritative databases, mostly public and continually enriched via peer scientific contributions. Given the ...

  • Towards privacy in personal data management 

    Efraimidis, Pavlos S.; Drosatos, Georgios; Nalbadis, Fotis; Tasidou, Aimilia (2009)
    Purpose – In order to enhance privacy protection during electronic transactions, the purpose of this paper is to propose, develop, and evaluate a personal data management framework called Polis that abides by the following ...

  • A distributed, plug-n-play algorithm formulti-robot applications with a priorinon-computable objective functions 

    Kapoutsis, Athanasios Ch.; Chatzichristofis, Savvas A.; Kosmatopoulos, Elias B. (Sage, 2019-05)
    This paper presents a distributed algorithm applicable to a wide range of practical multi-robot applications. In such multi-robot applications, the user-defined objectives of the mission can be cast as a general optimization ...

  • Studying Affective Tutoring Systems for Mathematical Concepts 

    Mastrodimos, Dimitrios; Chatzichristofis, Savvas A. (Sage, 2019-07-02)
    Students face difficulties in learning mathematical processes. As a result, they have negative emotions toward mathematics. The use of technology is employed to change the student’s attitude toward mathematics. Some ...

  • Randomblocks: A transparent, verifiable blockchain-based system for random numbers 

    Christodoulou, Klitos; Chatzichristofis, Savvas A.; Sirakoulis, Georgios Ch.; Christodoulou, Panayiotis (Old City Publishing, Inc, 2019)
    Games-of-chance require high-levels of trust between participants that is often uncertain and difficult to enforce. The unique characteristics introduced by the blockchain technology can be leveraged to inform a verifiable ...

  • Social Robots in Special Education: Creating Dynamic Interactions for Optimal Experience 

    Amanatiadis, A.; Kaburlasos, Vasileios G.; Dardani, Christina; Chatzichristofis, Savvas A.; Mitropoulos, Athanasios (IEEE, 2020-04-02)
    Recent research has proved the positive therapeutic impacts of robot interaction with children diagnosed with the autism spectrum condition. Until now, most of the evaluated treatment methods apply one-to-one sessions ...

  • Known Unknowns in an Era of Technological and ViralDisruptions—Implications for Theory,Policy, and Practice 

    Carayannis, Elias G.; Christodoulou, Klitos; Christodoulou, Panayiotis; Chatzichristofis, Savvas A.; Zinonos, Zinon (Springer Verlag, 2021-02-10)
    Technology is composed of the words “Techne” and “Logos” that refer to the artistic/ creative and the logical/scientific aspects of its dualism. And so inherent this Promethean concept lie the concepts of the Schumpeterian ...

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