Bus arrangement for use in chip of smart card, has encoder producing output bit by combing two input bits for outputs according to bijective imaging of inputs bits on output bits, and outputting output bits to bus lines via outputs

摘要

The arrangement has a bus (200) provided with multiple bus lines (201). An encoder has inputs for the bus lines for receiving input bits, and outputs for the bus lines. The encoder produces each of output bits by combing two of the input bits for the outputs according to bijective imaging of the inputs bits on the output bits, preferably bijective imaging of input bit vectors on output bit vectors, where the imaging corresponds to multiplication of the input bit vectors with a matrix and subsequent addition of the vectors. The encoder outputs the output bits to the bus lines via the outputs. An independent claim is also included for a method for sending data via a bus.