The Day Of The Mark Of The Beast Is Getting Closer All The Time

A small device built by legendary hacker Samy Kamkar can predict what new American Express card numbers will be and trick point-of-sale devices into accepting cards without a security microchip.

 Because American Express appears to have used a weak algorithm to generate new card numbers, the device, called MagSpoof, can predict what a new American Express card number will be based on a canceled card's number. 

The new expiration date can also be predicted based on when the replacement card was requested.