> Before you jump to the conclusion that you could just steal the black > box from the ATM and have access, but if you till it, it forgets all the > keys. Also during normal operation two separate people have to enter > two parts of the key. This way no single bank employee has access to > both parts of the key.
The product Krzystof mentions is likely similar to : http://gpsonsale.com/ibmcryptographiccards/products/IBM4758-002.htm http://www-3.ibm.com/security/cryptocards/ An interesting read regarding breaking into one of these black boxes : http://www.cl.cam.ac.uk/~rnc1/descrack/ - Mike