Wired looks at the use of Flash cookies
implemented by Adobe's browser plugin. "Several services even use the surreptitious data storage to reinstate traditional cookies that a user deleted, which is called re-spawning in homage to video games where zombies come back to life even after being 'killed,' the report found. So even if a user gets rid of a websites tracking cookie, that cookies unique ID will be assigned back to a new cookie again using the Flash data as the 'backup.'
" See also this 2008 post from Gnash developer Rob Savoye
, as well as an LWN article
from last October, for more information on Flash cookies.
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