What i am making here is a USB lock with smartcard key. The idea is that a phonecard reader made with a PIC micro will be able to store a number of different phonecards into memory. Whenever one of these cards is inserted into the slot, it will activate a 4-ports USB On/Off switch. If the card is removed, the USB ports will be de-activated. [Link]
![Lock Down USB Ports via a PIC-Based Smart Card Reader Lock Down USB Ports via a PIC-Based Smart Card Reader](http://2.bp.blogspot.com/-kVEkwClswDw/UCQVt7c9UnI/AAAAAAAAGnI/R_LuX_-KgbQ/s400/Smartcard_USB_Lock_12.jpg)
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