While AOL anonymized the data by replacing usernames with numeric IDs, the sheer volume and specificity of the search queries allowed journalists to "re-identify" individuals. This became a landmark case study in data privacy.
: It proved that "anonymized" data could be deanonymized through "mosaic" analysis (combining small bits of info to form a whole picture). at aol dumped-customers.rar
The most significant "complete feature" derived from this specific data dump (often archived as AOL_search_data.tar.gz or similar) is the . The "Complete Feature": Finding User 4417749 While AOL anonymized the data by replacing usernames
: The New York Times successfully identified User 4417749 as Thelma Arnold , a 62-year-old widow from Lilburn, Georgia. The most significant "complete feature" derived from this
The request "at aol dumped-customers.rar: produce a complete feature" appears to be a highly specific command or query related to the , where a file containing 20 million search queries from 658,000 users was accidentally released.