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When I look at the options used from Internet Explorer for the cookies, I read the following description:

Blocca i cookie di terze party privi di una versione compatta dell'informativa sulla privacy.

Its translation is roughtly:

Blocks the cookies without a compact version of the privacy's informative.

I don't get which cookies are blocked. From that description, it seems the cookies should include a compact description of the privacy informative, but I don't get how cookies can contain that information, or what happens with cookies set from sites outside the European Union.

What cookies are blocked?


The screenshot has been taken from Internet Explorer 9, but that words were used also from previous versions. The settings are the ones shown for the "Privacy" tab; I don't recall if the English version calls that tab the same way.

This is the screenshot for the English version.


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up vote 2 down vote accepted

The actual English text is:

Blocks third-party cookies that do not have a compact privacy policy.

This means that all cookies from third-party sites (ie. other than the site you're currently visiting) will be blocked unless the site can present a valid P3P privacy policy.


A P3P compact privacy policy is a machine-readable summary of the full P3P specification, which is a standardized method for explaining a website’s privacy policy.

This privacy policy isn't contained in the cookie itself, but instead is served by the web server, either as a separate file or a specially formatted HTTP header (see this MSDN article for more in-depth information and examples). The browser will need to know to look for this information before saving a cookie, and currently Internet Explorer is the only major browser supporting P3P.

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