Skip to main content

Encore: Lightweight measurement of web censorship with cross-origin requests

Author(s): Burnett, S; Feamster, Nick

To refer to this page use:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorBurnett, S-
dc.contributor.authorFeamster, Nick-
dc.identifier.citationBurnett, S, Feamster, N. (2015). Encore: Lightweight measurement of web censorship with cross-origin requests. 653 - 667. doi:10.1145/2785956.2787485en_US
dc.description.abstractDespite the pervasiveness of Internet censorship, we have scant data on its extent, mechanisms, and evolution. Measuring censorship is challenging: it requires continual measurement of reachability to many target sites from diverse vantage points. Amassing suitable vantage points for longitudinal measurement is difficult; existing systems have achieved only small, short-lived deployments. We observe, however, that most Internet users access content via Web browsers, and the very nature of Web site design allows browsers to make requests to domains with different origins than the main Web page. We present Encore, a system that harnesses crossorigin requests to measure Web filtering from a diverse set of vantage points without requiring users to install custom software, enabling longitudinal measurements from many vantage points. We explain how Encore induces Web clients to perform cross-origin requests that measure Web filtering, design a distributed platform for scheduling and collecting these measurements, show the feasibility of a global-scale deployment with a pilot study and an analysis of potentially censoredWeb content, identify several cases of filtering in six months of measurements, and discuss ethical concerns that would arise with widespread deployment.en_US
dc.format.extent653 - 667en_US
dc.relation.ispartofSIGCOMM 2015 - Proceedings of the 2015 ACM Conference on Special Interest Group on Data Communication17 August 2015en_US
dc.rightsAuthor's manuscripten_US
dc.titleEncore: Lightweight measurement of web censorship with cross-origin requestsen_US
dc.typeConference Articleen_US

Files in This Item:
File Description SizeFormat 
Encore Lightweight measurement of web censorship with cross origin requests.pdf474.58 kBAdobe PDFView/Download

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.