Comment Re:sata is free with chipset TB2 uses up pci-e lan (Score 1) 234
There are three TB2 busses. See: http://support.apple.com/kb/HT5918?viewlocale=en_US&locale=en_US
Simple:
When the card is inserted, the ATM asks for the card's public key
Then it's the card's turn to repeat the same process:
At this point, both the card and the ATM know that they are talking to the appropriate device. Each device can then generate a symmetrical key for that session, and encrypt it with the other device's public key, and use those keys for any further communication.
It is easier to write an incorrect program than understand a correct one.