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I wrote up a technique for storing values in the cache a little while back, no PNG or canvas necessary. http://joshduck.com/blog/2010/01/29/abusing-the-cache-t
by toolate 16y ago
I wrote up a technique for storing values in the cache a little while back, no PNG or canvas necessary.
http://joshduck.com/blog/2010/01/29/abusing-the-cache-tracking-users-without-cookies/ http://joshduck.com/blog/2010/01/29/abusing-the-cache-tracki...
- pyre 16y agoTrue, but it's more difficult to analyze and attempt to filter a PNG based on content.
- pornel 16y agoYou can analyze and filter script that extracts information from PNG, and such unusual script would draw attention. Cookie stored as a simple variable in a cached JS file is IMHO better solution if you're trying to be sneaky — there's nothing unusual in variable assignment or cacheable JS file.