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Link to original content: https://doi.org/10.1007/s11761-014-0156-8
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A quality model for social networks populated with web services

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Abstract

This paper presents the development and evaluation of a \(\mathcal {Q}\)o\(\mathcal {SN}\) (standing for \(\mathcal {Q}\)uality of \(\mathcal {S}\)ocial \(\mathcal {N}\)etwork) model for social networks populated with Web services. These Web services are given the opportunity to select the networks in which they would like to sign in taking into account their concerns (in fact their providers’ concerns) like better protection to their details and better exposure to potential users. To support Web services selection, the \(\mathcal {Q}\)o\(\mathcal {SN}\) model is built upon four criteria including robustness, trust, fairness, and traceability. The computation of these criteria uses a cryptographic technique known as secure multi-party computation. Different experiments showing how the networks react to Web services’ actions (e.g., attack, join, and kick out) are also presented in the paper.

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Notes

  1. Quality of Service (QoS) is adopted in other disciplines like networking and uses non-functional properties like response time, reliability level, and latency.

  2. It is worth noticing that robustness was called privacy in [17]. In this paper, we rename it to avoid overlap with the privacy property that SMC guarantees (Sect. 4).

  3. Repetitive and considerable gaps between a Web service announced-QoS and effective-QoS might indicate performance degradation and inability of delivering the announced QoS [25].

  4. http://www.cs.huji.ac.il/project/Fairplay/FairplayMP/SFDL2.0.

  5. FairPlay allows to write secure functions that deal with integers, only. Thus, in the implementation, we round each ratio to an integer. In particular, each decimal number is multiplied by 10, and then rounded to the next integer, if bigger or equal to .5 (otherwise, to the previous one).

  6. Despite the division is performed out of the SMC-function, inputs of all SWSs are kept preserved by the function 1.

  7. It is worth noticing that comparisons between a threshold value and the actual attackRatio of SWSs may be done by an appropriate use of secure two-party computation.

  8. A confidence interval gives an estimated range of values which is likely to include an unknown population parameter, the estimated range being calculated from a given set of sample data (http://www.stat.yale.edu/Courses/1997-98/101/confint.htm).

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Authors and Affiliations

  1. Université Lyon 1, Lyon, France

    Noura Faci

  2. Istituto di Informatica e Telematica, CNR, Pisa, Italy

    Marinella Petrocchi, Gianpiero Costantino & Fabio Martinelli

  3. Zayed University, Dubai, UAE

    Zakaria Maamar

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  1. Noura Faci
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  2. Marinella Petrocchi
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  3. Gianpiero Costantino
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  4. Fabio Martinelli
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  5. Zakaria Maamar
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Correspondence to Zakaria Maamar.

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Faci, N., Petrocchi, M., Costantino, G. et al. A quality model for social networks populated with web services. SOCA 9, 139–155 (2015). https://doi.org/10.1007/s11761-014-0156-8

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