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Submission + - evercookie: the invulnerable cookie (downloadsquad.com)

An anonymous reader writes: Using eight different techniques and locations, a 'security' guy has developed a cookie that is very, very hard to delete. If just one copy of the cookie remains, the other locations are rebuilt.

My favourite storage location is in 'RGB values of auto-generated, force-cached PNGs using HTML5 Canvas tag to read pixels (cookies) back out' — awesome.

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