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User fingerprint hash should be different by default on separate websites #6824

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mattab opened this issue Dec 8, 2014 · 0 comments
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User fingerprint hash should be different by default on separate websites #6824

mattab opened this issue Dec 8, 2014 · 0 comments
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@mattab
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c: Privacy For issues that impact or improve the privacy. Task Indicates an issue is neither a feature nor a bug and it's purely a "technical" change.
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2.10.0

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mattab commented Dec 8, 2014

The goal of this issue is to increase the Privacy-by-default in Piwik, by ensuring that Piwik will generate, for the same user across multiple websites, a different fingerprint hash config_id. Currently Piwik will generate the same fingerprint hash for a same user, across multiple websites.

To prevent Piwik admins from easily finding out all actions by a same user, we will introduce a seed in the fingerprint hash algorithm that will make it unique across several websites. Discovered this while working on #5907 - see also #5276 and #6160

Follows up #6082 and #6079
@mattab mattab added Task Indicates an issue is neither a feature nor a bug and it's purely a "technical" change. c: Privacy For issues that impact or improve the privacy. labels Dec 8, 2014
@mattab mattab added this to the Piwik 2.10.0 milestone Dec 8, 2014
@mattab mattab self-assigned this Dec 8, 2014
@mattab mattab closed this as completed in 38c5b33 Dec 8, 2014
@mattab mattab mentioned this issue Apr 12, 2015
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c: Privacy For issues that impact or improve the privacy. Task Indicates an issue is neither a feature nor a bug and it's purely a "technical" change.
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