In science-fiction author Cory Doctorow's short story "Scroogled," a woman shrugs when she sees "Immigration--Powered by Google" on an airport sign, but that's just the beginning of the search giant's presence in a not-too-distant future.

The story, published in Radar Magazine's latest issue, envisions a world in which Google turns into Big Brother. Customs agents grill travelers about their search queries, public places are swept by Webcams and officials look for terrorist connections in social-networking sites. All of this is made possible by Google's powerful search tools and the company's willingness to share its trove of personal data with the government.

While a work of fiction, Mr. Doctorow, 36 years old, one of the editors of the popular blog Boing Boing, said his story builds on his real concerns about the amount of information that Google and others collect and store about Web users, including search histories, email and videos. Its publication has sparked online discussions about online privacy and the plausibility of Mr. Doctorow's scenario.

Asked about the Orwellian story, a Google spokeswoman responded: "Google is proud to offer a range of innovative products that have proven to be both useful and trusted by our users. User trust is central to our business and that's why we aggressively protect our users' privacy."

Mr. Doctorow spoke with me about "Scroogled," why he's fond of Google despite his dystopian tale and why it's hard to get people worried about online privacy.

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