Several years ago, while researching a story about Internet pornography, I did a few Web searches that took me to some websites that I would never want my children to stumble across.
Although my editor (and my wife) knew what I was doing, the thought crossed my mind more than once about the potential damage to my reputation if someone found out about the sites I'd visited without knowing why.
These days, in my other job as writer of the Monitor website's Daily Update on Terrorism and Security, I regularly use a search engine to find stories, papers, or websites using words like "terrorism," "Al Qaeda," "bombings," "Taliban" - you name it. Again, the thought has crossed my mind about the kind of sites I'm visiting and how that would look to some bored tech worker at the Department of Homeland Security.
So when I heard that the United States government recently had asked Google, the Internet's most widely used search engine, to hand over a chunk of its data on Web searches, it made me sit up and pay attention. The request was ostensibly to help the government persuade a court to support a law that penalizes websites that allow children to access porn. While Google's refusal to provide the data turns out not to be the challenge to privacy portrayed in much of the media, the government's actions in this case do have long-term implications that need to be examined.
But first, let me answer the question that has been on many people's minds: How could the government use the data from Google (or the other search engines that have already handed over data) to find out what we've been searching for on the Internet?
Answer: IP addresses and "cookies."
Every computer that accesses the Internet receives an IP (Internet Protocol) address. It's a unique number that allows you to look for information on the Internet, and then allows that information to find you. In this case, think of it as your "home address" on the Web.
When you ask Google to search for, oh, I don't know ... Liberace, your IP address accompanies the data about the requested search as Google looks for fan sites. Once Google finds a site, it uses your IP address to route the information to your computer.