Doctoral thesis (Dissertations and theses)
Contextual Integrity and Tie Strength in Online Social Networks: Social Theory, User Study, Ontology, and Validation
Ahmed, Javed
2017
 

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Keywords :
Online Social Networks; Privacy; Ontology
Abstract :
[en] Online Social Networks (OSNs) have become an important part of daily digital interactions for more than half billion users around the world. Unconstrained by physical spaces, OSNs offer to social web users new means to communicate, interact, and socialize. Online social networks exhibit many of the characteristics of human societies in terms of forming relationships and sharing personal information. However, current OSNs mainly assume binary, static, and symmetric relationship of equal value between the connected users. In human societies, social relationships are of varying tie strength, dynamic, and asymmetric in nature. The lack of an effective mechanism to represent diversity in social relationships leads to undesirable consequences of users personal information leakage to the unwanted audience and raises privacy concerns. The issue of privacy has received significant attention in both the research literature and the mainstream media. In this dissertation, we conduct a user study to analyze users' attitude towards personal information disclosure in online social networks. The study gives insight into user's information sharing behavior and interaction patterns in online social networks. The findings reveal that personal information disclosure depends on the quality of relationship among the users and it can be easily inferred from user interaction pattern in online social networks. We propose a theoretical framework that addresses the aforementioned issue from a social science perspective and exploits existing social theories of Goffman, Granovetter, and Nissenbaum to model social privacy for OSNs users. Based on this theoretical framework, we developed SOCPRI (SOCial PRIvacy) ontology to represent diversity in social relationships in online social networks. This model regulates personal information disclosure on the basis of the social role and the relationship quality between the OSNs users. The model is evaluated by translating competency questions into description logic (DL) queries to demonstrate the applicability of our approach. The results of ontology evaluation demonstrate the appropriateness of our ontology against proposed requirements. Based on this model a privacy-friendly online social networking environment can be developed to address some of the existing issues such as context collapse and user control.
Research center :
CSC
Disciplines :
Computer science
Author, co-author :
Ahmed, Javed ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC)
Language :
English
Title :
Contextual Integrity and Tie Strength in Online Social Networks: Social Theory, User Study, Ontology, and Validation
Defense date :
29 September 2017
Number of pages :
330
Institution :
Unilu - University of Luxembourg, Luxembourg City, Luxembourg
Degree :
Docteur en Informatique
Focus Area :
Security, Reliability and Trust
Name of the research project :
R-AGR-0026 - LAST-JD - part UL (20130901-20201231) - VAN DER TORRE Leon
Funders :
Erasmus Mundus LAST-JD
Available on ORBilu :
since 04 November 2017

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