PayPal security key card - is it worth it?

Complex passwords are one way to protect and secure your financial information, but if you want the ultimate level of protection for your online transactions you may want to look into a PayPal security key card. This credit card-sized piece of plastic adds an extra layer of security by generating a unique, six-digit number to use when you're conducting a PayPal transaction.

The card has a small button that, when pressed, will generate and display a new random security code known only to your card and PayPal. This six-digit code is actually tied to an incredibly large number and PayPal says these numbers are, "practically impossible to duplicate."