Internet Explorer Privacy Settings

Microsoft Internet Explorer 6 added a Privacy tab to give users more control over cookies. There are different levels of privacy on the Internet zone, and they are stored in the registry at the same location as the security zones.

You can also add a site to allow or to block cookies based on the site, regardless of the privacy policy on the Web site. Those registry keys are stored in HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History. In this key, you see the domains that have been added as a managed site. These domains are set to one of the following values:

0x00000005.
Always Block
0x00000001.
Always Allow