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Tweeting with Hummingbird: privacy in large-scale micro-blogging OSNs

 

In recent years, micro-blogging Online Social Networks (OSNs), such as Twitter, have taken the world by storm, now boasting over 100 million subscribers. As an unparalleled stage for an enormous audience, they offer fast and reliable diffusion of pithy tweets to great multitudes of information-hungry and always-connected followers with short attention spans. At the same time, this appealing information gathering and dissemination paradigm prompts some important privacy concerns about relationships between tweeters, followers and interests of the latter. In this paper, we assess privacy in today’s Twitter-like OSNs and describe an architecture and a trial implementation of a privacy-preserving service called Hummingbird – a variant of Twitter that protects tweet contents, hashtags and follower interests from the (potentially) prying eyes of the central server. We argue that, although inherently limited by Twitter’s mission of scalable information dissemination, the attainable degree of privacy is valuable. We demonstrate, via a working prototype, that Hummingbird’s additional costs are tolerably low. We also sketch out some viable enhancements that might offer even better privacy in the long term.

 
 
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citation

De Cristofaro, E.; Soriente, C.; Tsudik, G.; Williams, A. Tweeting with Hummingbird: privacy in large-scale micro-blogging OSNs. IEEE Data Engineering Bulletin, special issue on security and privacy in the cloud. 2012 December; 35 (4): 93-100.

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Copyright © IEEE, 2012. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.