I was just reading over Samy's new post about a persistent cookie that manages to rewrite itself, even if deleted. Apparently it can be easily defeated with the NoScript plugin for Firefox, but it's still pretty scary/cool if you're an advertiser.
Link: evercookie - virtually irrevocable persistent cookies
WARNING: Visit the link above at your own risk, it might drop a PoC persistent cookie on your box.
Link: evercookie - virtually irrevocable persistent cookies
WARNING: Visit the link above at your own risk, it might drop a PoC persistent cookie on your box.
