A Private Affair

Like a bit of privacy? Good luck. Retailers happily sell data about you to direct mailers and others. And with the coming of "smart cards"--credit cards with info on you carried in a chip--worries in tensify. But what data are consumers most leery about? A survey shows the closer a snoop comes to things you do every day--whom you call, what videos you watch--the more sensitive you get.

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