YouHaveDownloaded

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YouHaveDownloaded was an experimental web-based platform launched in December 2011 that allowed users to enter an IP address and view a list of torrent files recently downloaded from that address. The site quickly gained international attention as a provocative demonstration of how publicly available BitTorrent network data could be used to expose users' online behaviour. The platform has been operated by collecting data from the public BitTorrent ecosystem, including: Distributed Hash Table (DHT) nodes and Public trackers. The system matched IP addresses to .torrent files. It did not log actual file contents or timestamps, limited by known limitations: dynamic IP address reassignment, use of VPNs or proxies and carrier-grade NAT. Despite these limitations, the system indexed over 50 million IP addresses, which was estimated to cover over 20 per cent of all global torrent activity at its peak. The service ran on a single server and cost less than $300/month to operate. A small team of three developers led by Suren Ter-Saakov created the website. "The whole thing started with a theoretical discussion I had with some friends about what is possible to track..." — S.Ter-Saakov, KrebsOnSecurity In one of the most high-profile incidents, journalists discovered that an IP address associated with the Élysée Palace, the residence of French President Nicolas Sarkozy, appeared in the database. The IP was linked to downloads of music by The Beach Boys and several comedy films.