Web tracking has seen a remarkable usage increase during the last years. Unfortunately, an overview of how web tracking evolved within the last˜15 years is missing. In this paper we present a retrospective analysis using archived data to quantify the usage and distribution of web tracking and how it changed throughout the last decade. We identify a more than five fold increase in external requests between 2005 and 2014. About half of the analyzed websites have a web tracking based inclusion today (2015). As web tracking is often associated with a risk of privacy loss, we also outline the security implications of monopolized ubiquitous tracking.
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