Banca de DEFESA: JOSÉ RONALDO LELES JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JOSÉ RONALDO LELES JUNIOR
DATE: 21/12/2021
TIME: 09:00
LOCAL: https://meet.google.com/xum-mgqj-uei
TITLE:

DOSN-PRIV:: Model and Service for Privacy in Decentralized Online Social Networks

KEY WORDS:

Privacy, Access Control, Online Social Network, Decentralized Online Social Network, Ontology, SWRL.

PAGES: 81
BIG AREA: Ciências Exatas e da Terra
AREA: Ciência da Computação
SUBÁREA: Metodologia e Técnicas da Computação
SUMMARY:

The intensive use of Online Social Networks (OSNs) has been caused users to worry about data privacy. Given the centralized nature of these platforms, and since each has a particular storage mechanism, authentication, and access control, its users do not have the control and the right over their data. Thus, users can not easily switch between similar platforms or even transfer data from a platform to another. This implies, among other things, in a threat to privacy, since such users depend on the interests of the service provider responsible for OSN's administration. As a strategy for the decentralization of the OSNs and consequently as a solution to the privacy problems in these environments, the so-called Decentralized Online Social Networks (DOSNs) have emerged. Unlike OSNs, DOSNs are decentralized content management platforms in the sense that they do not use of centralized service providers. Although DOSNs address some of the privacy issues encountered in OSNs, the DOSNs also pose important challenges to be considered, for example, with regard to access control to user profile information with a lower level of granularity. In this context, this work proposes the development of an ontological model and a service to support privacy in DOSNs. The proposed model will be formalized through an OWL ontology that should describe the main concepts of access control for privacy in DOSNs and their relationships, while the service will consume the model to apply access control according to the policies represented in the model. The Dosn-Priv model was evaluated in two phases to verify its compliance with the proposed domain. Finally, the DosnPrivServ privacy service underwent a performance evaluation and its results were satisfactory regarding the response time of access control requests.

BANKING MEMBERS:
Presidente - 1814369 - CASSIO VINICIUS SERAFIM PRAZERES
Interno - 2011187 - FREDERICO ARAUJO DURAO
Externo à Instituição - DILVAN DE ABREU MOREIRA - USP