Your Web browsing history is totally unique
French researchers who did some sanctioned browser sniffing find the majority of Internet users have unique browsing histories that make them identifiable.
In a new study from the French public research institute Inria, (PDF) researchers themselves did the browser sniffing and discovered that most users have a completely distinctive history when it comes to Web sites they regularly visit. Their results show that users' browser history is akin to their fingerprints (totally unique)
Here`s what the study says:
Our results show that for a majority of users (69 percent), the browsing history is unique and that users for whom we could detect at least 4 visited Web sites were uniquely identified by their histories in 97 percent of cases. We observe a significant rate of stability in browser history fingerprints: for repeat visitors, 38 percent of fingerprints are identical over time...The results indicate that Web browsing histories, which can be obtained by a variety of known techniques, may be used to divulge personal preferences and interests to Web authors; as such, browsing history data can be considered similar to a biometric fingerprint.