Actualy looking to do usb+microcontroller+cpld or usb+ microcontroller ip in fpga LOOKING FOR PARTNERSHIP IN DEVELOPMENT OF THIS UNIT
a couple of good sites
Get your feet wet in the smart card arena
CLICK ON THE LOWER LINK FOR THE .PDF FOR SOC(SYSTEM ON CHIP) FOR A SECURE MICROCONTROLLER IN THE LINK BELOW:
BELOW IS A SECURITY EVALUATION OF A PHILIPPS SECURE MICROCONTROLLER
Here are some ip cores (the heart of the secure microcontroller is the cryptography)
Link below of .pdf of major attacks that can be done on chips and what to do to improve them, the interest being that the smartcard microcontroller being secure is of essence.