Smart card microcontroller secured against current attacks, uses module between processor and external supply which chaotically encrypts supply current fluctuations

摘要

The microcontroller (3) has a working processor (4) which draws its current through a module (8) which encrypts variations in external supply current to the card as each instruction is executed in the working processor. Both processor and encryption module are installed on a smart card (1). The encryption module uses chaotic modulation of current.