American Express Co., amid continued consumer concerns over online security, is proposing an answer: disposable credit card numbers. The card number would be good for one transaction only, and shoppers would no longer have to give their credit-card number to merchants . . .
American Express Co., amid continued consumer concerns over online security, is proposing an answer: disposable credit card numbers. The card number would be good for one transaction only, and shoppers would no longer have to give their credit-card number to merchants over the Web. The service, to be called Private Payments, will be free for cardholders and will cost nothing extra for merchants who accept American Express. The service will be available to holders of any American Express card within a month.

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