Cloud-assisted dissemination in social overlays

Abstract

Abstract-Decentralized social networks are an emerging solution to the privacy issues plaguing mainstream centralized architectures. Social overlays-overlay networks mirroring the social relationships among node owners-are particularly intriguing, as they limit communication within one's friend circle. Previous work investigated efficient protocols for peer-to-peer (P2P) dissemination in social overlays, but also showed that the churn induced by users, combined with the topology constraints posed by these overlays, may yield unacceptable latency.In this paper, we combine P2P dissemination on the social overlay with occasional access to the cloud. When updates from a friend are not received for a long time, the cloud serves as an external channel to verify their presence. The outcome is disseminated in a P2P fashion, quenching cloud access from other nodes and, if an update exists, speeding dissemination. We show that our protocol performs close to mainstream centralized architectures and incurs only modest monetary costs.

Analyzing and Boosting the Data Availability in Decentralized Online Social Networks

“…In order to address the data privacy issue in a centralized server (i.e., the Cloud in this work), an obvious solution is to encrypt the user data stored in the centralized server (Buchegger, Schiöberg et al 2009, Tegeler, Koll et al 2011, Mega, Montresor et al 2013, Graffi, Gross et al 2010. A typical procedure of this solution is as follows (Graffi, Gross et al 2010).…”

Cadros: The Cloud-Assisted Data Replication in Decentralized Online Social Networks

“…In 2013, Mega et al [16] proposed a cloud-assisted dissemination approach in social overlays. In this approach, Updates to the user's profile are always performed first on the profile store, which is encrypted and hosted in the cloud, and are then disseminated via the social overlay.…”

“…Predicting DA With the results of ‫ܦ‬ ௦௧ ‫ݐ(‬ ᇱ ) and ‫ܦ‬ ௨_ ‫ݐ(‬ ᇱ ), the level of DA that the offline friend ‫ݒ‬ can achieve when he comes online at t', denoted by ‫ܣܦ‬ ‫ݐ(‬ ᇱ ), can be calculated using Eq. (16).…”

“…In order to address the data privacy issue, an obvious solution is to encrypt the user data stored in the centralized server [1,2,16,29]. Typically, this solution works in the following way [1].…”