Now that Visa, MasterCard, and American Express and others are actively putting so-called contactless cards into the hands of consumers (Chase's blink for instance), it's not such a far-fetched thought that these radio-frequency (RF) cards could be used as the extra factor for online banking login.

PCs equipped with RF card readers could read the user's plastic, allowing the user to log in securely with just a username/password, or conceivably just a password.

But PC makers aren't going to add card reading technology, no matter how cheap it is, just for online banking. But if merchants began insisting on the RF readers to cut down on card fraud for online purchases, perhaps with the associations agreeing that a purchase made with a PC-based RF reader qualified as a "card present" transaction, then the technology could take off.

Using contactless cards online could be more beneficial than using them for off-line purchases. In the physical world, the contactless card merely saves a few seconds compared to swiping it through a conventional terminal. But online the savings could be more dramatic, potentially allowing the customer to skip typing their card and verification number into a web forms. 

--JB