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eGovernment

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Publications

  • 2014
    Wiem Hammami, Ilhem Souissi, Lamjed Ben Said

    A New Fuzzy-Based Approach for Anonymity Quantification in E-Services

    E-Services. International Journal of Information Security and Privacy (IJISP), 8(3), 13-38., 2014

    Résumé

    In online services, making anonymous transactions is a crucial need in order to ensure the user's trust towards a particular service. In this context, anonymity quantification is required to provide at which level the e-service respects the user privacy regarding the link between his/her identity and actions. Most of the existing researches are limited to the anonymity quantification in a static way and based, mainly, on the user's set size. In this paper, the authors propose a new multi-agent based approach for anonymity quantification in e-services considering dynamic and mobile environment's characteristics. The authors' quantification is based on the fuzzy logic. It is based not only on the anonymity set size, which is always known in advance, but also on a set of other criteria such as the number of users and the priori and posteriori knowledge about internal and external attackers of an e-service. The carried out experimentations show competitive and better results when compared to other recently proposed anonymity quantification.

  • Wiem Hammami, Lamjed Ben Said

    A DISTRIBUTED PRIVACY-PRESERVING MODEL FOR E-SERVICES

    International Conference on Internet Technologies & Society., 2013

    Résumé

    In this paper, we propose a model for privacy protection of users in the context of e-services. A system based on our model has to respect a set of properties to preserve the user privacy. These properties are formulated as a set of privacy constraints: the anonymity, the pseudonymity, the unobservability and the unlinkability constraints. To satisfy these constraints we use the Distributed Constraint Satisfaction approach such that: (1) the variables correspond to the user’s credentials, (2) the agents correspond to the set of e-services entities that control these variables and (3) the constraints correspond to the set of privacy constraints. A solution to the problem is achieved when all the privacy constraints are satisfied. To validate the applicability of our proposed model, a set of experimentation results are discussed.

  • Wiem Hammami, Lamjed Ben Said, Sameh Hadouej

    ABC: A new Privacy Enhancing Model for eGovernment

    In ECEG2010-Proceedings of the 10th European Conference on E-Government: National Center for Taxation Studies University of Limerick, Ireland 17-18 June 2010 (p. 207). Academic Conferences Limited., 2010

    Résumé

    The use of eGovernment systems requires the collection of a big amount of personal data of citizens in every transaction. In such context, issues related to privacy, such as data collection and disclosure of personal information without any predefined purpose, have to be considered. In this paper, we propose a new multi-agent based model, called ABC, and used to handle privacy issues in eGovernment. The proposed model offers the possibility to statistically assess trust degree for a given eGovernment process. Also, a case study is used to simulate and to illustrate the applicability of the proposed model.