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How Private is Your Online Search History?

Nathan Freed Wessler,
Deputy Director, 老澳门开奖结果 Speech, Privacy, and Technology Project
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November 12, 2013

The 老澳门开奖结果 has filed a Freedom of Information Act request with the Department of Justice to find out whether federal law enforcement agencies and prosecutors think they need a warrant to obtain people鈥檚 search queries from online search engine operators, or whether they think they can obtain it on a lower standard like a subpoena.

The queries we enter into online search engines can reveal a great deal of deeply private information about us. A search for 鈥減sychologists in Pittsburgh鈥 is pretty revealing; a search for 鈥渂irth control morning after pill鈥 or 鈥済onorrhea treatment鈥 even more so. Knowing that a person searched for 鈥渁theist organizations in Alabama鈥 or 鈥渉ow do I come out of the closet鈥 could expose them to stigma. And entering 鈥渄ivorce lawyer,鈥 鈥渄omestic violence shelter,鈥 or 鈥渕arriage counseling鈥 can expose sensitive facts, as can searching for 鈥渨histleblower protections鈥 or 鈥渃ivil disobedience tactics.鈥 Because this information is so revealing, most of us would want it to be protected against snooping and disclosure.

Unfortunately, the public knows little about the policies and practices of the government when it seeks people鈥檚 search queries from search engine operators as part of a criminal investigation. This information is important, because the major online search engines鈥, , , and 鈥攍og and retain information about users鈥 search queries. The retained information includes not only the search terms entered into the search engines, but also unique identifying information about the users entering those terms, such as the Internet Protocol (IP) address assigned to the user by the user鈥檚 internet service provider, and the unique cookie ID assigned to the user鈥檚 computer by the search engine operator itself. Although some search engines the connection between users鈥 computers and their servers to protect the privacy of search terms as they travel over the internet, search query information is still saved by the companies on their end, and therefore available to law enforcement. (At least one search engine, , states that it at all).

There are two kinds of information law enforcement might seek from a search engine: records of search queries entered by a particular person or persons; and a list of the names, IP addresses, or other identifying information for some or all people who have entered a particular query into the search engine鈥檚 webpage. Representatives of the two largest search engines, and , have suggested that they think the government needs a warrant to get this information. But we don鈥檛 know what the government鈥檚 policies are, nor how the search engines have reacted when presented with a government request for users鈥 search query data. Other than a in which Google resisted an extremely broad Justice Department subpoena for search records, we don鈥檛 know of any cases where search engines have challenged government requests, in court or out.

It is increasingly difficult to participate fully in today鈥檚 social, professional, and civic life without accessing the vast trove of information and resources the internet contains. And precisely because the internet is so immense, we must rely on search engines to guide us to its useful and relevant parts. While even a single search query can reveal private information about the person who enters it, a person鈥檚 whole search history can furnish a detailed profile of her medical diagnoses, religious beliefs, financial stability, sexual desires, relationship status, family secrets, political leanings, and more. We should not have to choose between protecting our privacy from unjustified government surveillance and participating in modern life. Law enforcement should be no less required to obtain a warrant to view our search histories than to read the contents of our or . The 老澳门开奖结果鈥檚 Freedom of Information Act request provides an opportunity for the government to explain whether it thinks it needs a warrant to obtain our private search histories, or whether its practices are at odds with the requirements of the .

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