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=== What to avoid === | === What to avoid === | ||
It should not include exact historic numbers either, because they, too, would allow to puzzle the numbers together and allow to again build a history of IP addresses for a given user. Similarly, the exact time of the previous submission would allow to piece submissions together and must not be submitted, but rather only the day (2011-02-12, not minutes or seconds | It should not include exact historic numbers either, because they, too, would allow to puzzle the numbers together and allow to again build a history of IP addresses for a given user. Similarly, the exact time of the previous submission would allow to piece submissions together and must not be submitted, but rather only the day (2011-02-12, not minutes or seconds). It must be impossible to match 2 submissions together, even when considering several parameters as a collection, see http://panopticlick.eff.org/ . | ||
== Client-side<br> == | == Client-side<br> == | ||