Google says IE privacy policy is impractical in modern Web

Microsoft had earlier charged Google with bypassing privacy protections in Internet Explorer

By , IDG News Service |  Security, Apple, Google

Microsoft's privacy protection feature in Internet Explorer, known as P3P, is impractical to comply with while providing modern web functionality such as cookie-based features, Google said Monday in response to an accusation from Microsoft that Google had bypassed privacy protections in Internet Explorer.

Google is already facing allegations that the company circumvented privacy settings in Apple's Safari browser to plant cookies on users.

"We've found that Google bypasses the P3P Privacy Protection feature in IE," Dean Hachamovitch, Microsoft's corporate vice president for Internet Explorer said in a blog post. The result is similar to the recent reports of Google's circumvention of privacy protections in Safari, even though the actual bypass mechanism Google uses is different, he added.

IE by default blocks third-party cookies unless a site presents to the browser a P3P Compact Policy Statement describing how the site will use the cookie and pledging not to track the user. Third party cookies are those dropped by domains other than the one in the user's browser address bar.

Google sends a P3P policy that fails to inform the browser about Google's use of cookies and user information, and is in fact a text statement that it is not a P3P policy, Hachamovitch said. The company is taking advantage of a technical nuance in the P3P specification, as in an attempt to leave room for future advances in privacy policies, the P3P specification states that browsers should ignore any undefined policies they encounter, he said. "P3P-compliant browsers interpret Google's policy as indicating that the cookie will not be used for any tracking purpose or any purpose at all," Hachamovitch said.

Google's senior vice president of communications and policy, Rachel Whetstone, countered in an emailed statement that Microsoft's policy is "widely non-operational".

Newer cookie-based features are broken by the Microsoft implementation in IE, Google said. These include features such as Facebook "Like" buttons, the ability to sign-in to websites using a Google account, and hundreds more modern web services. It is well known that it is impractical to comply with Microsoft's request while providing this web functionality, Google added.

Google said it has been open about its approach on P3P, and so have other websites including Facebook.

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