How to search like a spy: Google's secret hacks revealed

Try: "filetype:xls site:za confidential"

Now you can Google like a private eye.
(Image credit: Chris Jackson/Getty Images)

The National Security Agency just declassified a hefty 643-page research manual called Untangling the Web: A Guide to Internet Research (PDF) that, at least at first, doesn't appear all that interesting. That is, except for one section on page 73: "Google Hacking."

"Say you're a cyberspy for the NSA and you want sensitive inside information on companies in South Africa," explains Kim Zetter at Wired. "What do you do?"

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These are just two examples of the numerous private files that are inadvertently uploaded to the Internet, and can be accessed if you know the right Google search terms.

Here are a few more:

Pretty neat, huh? Declassified information being what it is, though, some of the search tips can appear a little dated.

And even if keyboard espionage isn't really your thing, the document contains a number of practical tips anyone can use to become a better Googler:

* Adding a tilde (~) immediately before a term will search for its synonyms. For example: "Scary ~animals" will also search for "scary creatures," etc.

* Repeating a word will help you find more relevant hits. For example a search for "java coffee coffee coffee" will cut down on the results about the programming language.

* You can use Google wildcard (*) to replace a term in a query if you don't know exactly what you're searching for. For example: "Sacramento is the * of California."

Take a look if you're interested over here. (Via Wired)

Chris Gayomali is the science and technology editor for TheWeek.com. Previously, he was a tech reporter at TIME. His work has also appeared in Men's Journal, Esquire, and The Atlantic, among other places. Follow him on Twitter and Facebook.