دانلود رایگان مقاله انگلیسی خدمات حفظ حریم خصوصی غیرمتمرکز برای شبکه های اجتماعی آنلاین - الزویر 2018

abstract

Current popular and widely adopted Online Social Networks (OSNs) all follow a logically centered architecture, by which one single entity owns unprecedented collections of personal data in terms of amount, variety, geographical span, and richness in detail. This is clearly constituting one of the major threats to users privacy and to their right to be-left-alone. Decentralization has then been considered as the panacea to privacy issues, especially in the realms of OSNs. However, with a more thoughtful consideration of the issue, it could be argued that decentralization, if not designed and implemented carefully and properly, can have more serious implications on users privacy rather than bringing radical solutions. Moreover, research on Decentralized Online Social Networks (DOSNs) has shown that there are more challenges to their realization that need proper attention and more innovative technical solutions. In this paper, we discuss the issues related to privacy preservation between centralization and decentralization, and we provide a review of available research work on decentralized privacy preserving services for social networks.

6. Conclusion

Decentralization is undoubtedly one of the inherent solutions to major offline privacy issues in OSNs; however, it does not come free of new challenges and issues to privacy itself. In this paper, we have presented a discussion on privacy issues related to the shift from centralized to decentralized architectures for social networks. We made our synthesis based on three main axes that we believe are of high importance when considering privacy preserving DOSNs. Namely, we have discussed the challenges related to data storage and replication, to data access control management, and to fake accounts and fake content management. We have provided a review of the major works that focus on providing privacy preserving services under decentralized conceptions of OSNs, and that operate under those identified axes. We have also highlighted areas where we believe there is still need for more research efforts, especially w.r.t dynamic group membership management and effi- cient and timely access revocation support. With the development of new technologies for P2P computing, such as Blockchains, that promise the provision of secure and strong platforms for accountable decentralized systems, we think that there is more potential around DOSNs research as well.