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The popularity of Online Social Networks (OSN) has accelerated the appearance of vast amounts of personal information on the Internet. Our research shows that it is possible for third-parties to link PII, which is leaked via OSNs, with user actions both within OSN sites and elsewhere on non-OSN sites. We refer to this ability to link PII and combine it with other information as \"leakage\". We have identified multiple ways by which such leakage occurs and discuss measures to prevent it.<\/jats:p>","DOI":"10.1145\/1672308.1672328","type":"journal-article","created":{"date-parts":[[2012,10,12]],"date-time":"2012-10-12T19:06:47Z","timestamp":1350068807000},"page":"112-117","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":46,"title":["On the leakage of personally identifiable information via online social networks"],"prefix":"10.1145","volume":"40","author":[{"given":"Balachander","family":"Krishnamurthy","sequence":"first","affiliation":[{"name":"AT&amp;T Research Labs, Florham Park, NJ, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Craig E.","family":"Wills","sequence":"additional","affiliation":[{"name":"Worcester Polytechnic Institute, Worcester, MA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2010,1,7]]},"reference":[{"key":"e_1_2_1_1_1","unstructured":"James Abbatiello. 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