"History sniffing" is an attack in which a malicious website can figure out what other websites you have visited by taking advantage of the way browsers draw visited and unvisited hyperlinks differently. This made headlines in 2010 thanks to a widely read academic paper and browser vendors figuring out how to block the attack. The oldest description of the attack I have been able to find was in 2002, but the oldest use of the phrase "history sniffing" I have been able to find was in 2008.
Can anyone antedate the phrase, or the disclosure of the attack? (I tried Google's timeline search, which you would think would be good for this sort of thing, but it fails to limit its results to uses of the exact phrase "history sniffing" even when I use the quote syntax, so it's useless.)