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File:Online Tracking OpenWPM 1 million sites.pdf

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Online_Tracking_OpenWPM_1_million_sites.pdf(file size: 667 KB, MIME type: application/pdf)

Online tracking: 1-million-sites measurement and analysis

They're Watching You (You Have No Idea How Closely)

WebTAP / Web Transparency & Accountability Project (Princeton University)


May 18, 2016

Steven Englehardt / Princeton University / ste@cs.princeton.edu

Arvind Narayanan / Princeton University / arvindn@cs.princeton.edu


We present the largest and most detailed measurement of online tracking conducted to date, based on a crawl of the top 1 million websites. We make 15 types of measurements on each site, including stateful (cookie-based) and stateless (fingerprinting-based) tracking, the effect of browser privacy tools, and the exchange of tracking data between different sites (“cookie syncing”). Our findings include multiple sophisticated fingerprinting techniques never before measured in the wild.

This measurement is made possible by our web privacy measurement tool, OpenWPM, which uses an automated version of a full-fledged consumer browser. It supports parallelism for speed and scale, automatic recovery from failures of the underlying browser, and comprehensive browser instrumentation. OpenWPM is open-source and has already been used as the basis of seven published studies on web privacy and security...

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