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Enhancing privacy protection in social network systems through decentralization and policy conflict management

Regina Paiva Melo Marin 1, 2
1 CIDRE - Confidentialité, Intégrité, Disponibilité et Répartition
CentraleSupélec, Inria Rennes – Bretagne Atlantique , IRISA-D1 - SYSTÈMES LARGE ÉCHELLE
Abstract : In Social Network Systems (SNSs), the sharing of information leads to many privacy concerns about potential abuses of personal information. Users’ control over information shared with the SNS provider and with other users could be improved in SNSs through the decentralization of personal data, and the proper management of policy conflicts. Inspired by the decentralization approach, the firrst contribution of this thesis is the proposal of SNS design properties relevant to privacy when considered along a gradation of decentralization. These properties are organized in a multi-criteria analysis grid, designed to analyze and compare SNSs. The application of a lattice structure on this grid allows to evaluate, classify and visualize different SNSs within a partial hierarchy. While decentralization solves issues involving the SNS provider, privacy policies play a leading role in the protection of unauthorized data access from other users. The second contribution of this thesis consists in the introduction of the concept of equity in the context of policy conflict management. An algorithm to maintain equity between users in SNSs is introduced to solve conflicts that may arise between the privacy policies of several users, avoiding that some users take advantage over others. The evaluation shows that the equity approach introduced in this thesis leads to better results than classical conflict resolution strategies, reducing existing inequities in terms of policy enforcement.
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Submitted on : Friday, February 26, 2016 - 6:03:08 PM
Last modification on : Friday, April 10, 2020 - 2:11:22 AM
Document(s) archivé(s) le : Friday, May 27, 2016 - 10:42:02 AM


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  • HAL Id : tel-01242091, version 2


Regina Paiva Melo Marin. Enhancing privacy protection in social network systems through decentralization and policy conflict management. Other. CentraleSupélec, 2015. English. ⟨NNT : 2015CSUP0020⟩. ⟨tel-01242091v2⟩



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