Privacy, Cost, and Availability Tradeoffs in Decentralized OSNs

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Executive Summary

Online Social Networks (OSNs) have become enormously popular. However, two aspects of many current OSNs have important implications with regards to privacy: their centralized nature and their acquisition of rights to users' data. Recent work has proposed decentralized OSNs as more privacy-preserving alternatives to the prevailing OSN model. The authors present three schemes for decentralized OSNs. In all three, each user stores his own personal data in his own machine, which they term a Virtual Individual Server (VIS). VISs self-organize into peer-to-peer overlay networks, one overlay per social group with which the VIS owner wishes to share information.

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