HIDING INFORMATION TRANSMITTED ON A DATA BUS

摘要

A smart card is provided in which addresses of data are hidden. The smart card comprises a microcontroller (10), a memory (12) and a data bus (14) for the transmission of data therebetween. Memory address is hidden by use of a bus interface (18) provided at each of the microcontroller (10) and the memory (12) which performs a scrambling/unscrambling function on the address.