Identity Theft: How Companies Learn, Lose, Your Secrets

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Last week thieves stole the financial information of some 40 million Target shoppers who swiped their cards inside the big box stores. It's just the latest crime in what has become a multi-billion-dollar industry, the collection and brokering of personal information: where you shop, what you buy and even when you buy it. Charles Duhigg, staff writer for the New York Times and author of The Power of Habit: Why We Do What We Do in Life and Business, look at buying in an age of identity theft.