Patent 7815125 was granted and assigned to Oberthur Technologies on October, 2010 by the United States Patent and Trademark Office.
The microprocessor card includes a first microprocessor and a second microprocessor, the first microprocessor including elements for commanding the second microprocessor. In embodiments, the card includes electrical contacts adapted to carry command signals, these electrical contacts being connected exclusively to the first microprocessor. In embodiments, the first microprocessor includes elements for commanding the second microprocessor via commands conforming to the ISO 7816 standard. The first microprocessor uses a lower level of security than the second microprocessor.