"fake credit card numbers"
The fact that fake card numbers exist and can be used points to a lack of security on the part of banks. In Luxembourg, it is not enough to have a credit card for online transactions anymore. I have a USB-like token that, on the press of a button, gives me a 6-digit PIN code that I have to enter to validate my purchase.
If banks all over the world adopted that level of functionality, the fake card issue would disappear by itself.
Biting the hand that feeds IT
