New, Undeletable, Web Cookie
A couple of weeks ago Wired reported the discovery of a new, undeletable, web cookie:
Researchers at U.C. Berkeley have discovered that some of the net’s most popular sites are using a tracking service that can’t be evaded — even when users block cookies, turn off storage in Flash, or use browsers’ “incognito” functions.
The Wired article was very short on specifics, so I waited until one of the researchers — Ashkan Soltani — wrote up more details. He finally did, in a quite technical essay: