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Sophia got an e-mail asking for her credit card account number.

索菲亚收到一封向她索要信用卡账号的电子邮件。

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That's the three-digit code on the back of every credit card that most, but not all, e-retailers ask for when making a purchase.

这是一种三位数字的代码，印在信用卡的背面，多数，但不是所有的电子零售商在进行买卖交易是都要求提供这一代码。

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Although fast-growing, the regional e-commerce market is hampered by low credit-card use and poor postal services.

ECONOMIST: The Internet

In recent years, passing on sensitive data points like e-mail addresses and credit card codes to marketing partners has also been a frequent source of corporate data breaches--about 40% of all breach incidents were a result of a third party's handling of data, according to another Ponemon study, released in November 2007.

FORBES: What Privacy Policy?

While bricks-and-mortar retailers only have to decide whether to accept checks and major credit cards, e-commerce is open to all sorts of other payment possibilities--including e-checks, PayPal and transactions in currencies other than the dollar.

FORBES: Magazine Article