Countermeasure method and device for protecting data circulating in an electronic component

摘要

The disclosure relates to a countermeasure method in an electronic component, wherein binary data are transmitted between binary data storage units, binary data being transmitted in several transmission cycles comprising a first cycle comprising: randomly selecting bits of the data, transmitting the selected bits and transmitting bits, each having a randomly chosen value, instead of transmitting non-selected bits of the data. A last transmission cycle comprises transmitting bits of the data that have not been transmitted during a previous cycle.

主权项

1. A method comprising:
transmitting binary data as a countermeasure for protecting data in an electronic component over plural transmission cycles comprising a first transmission cycle and a last transmission cycle, wherein the transmitting comprises during the first transmission cycle:
randomly selecting bits of the binary data, positions of the selected bits in the binary data being random;modifying the binary data by replacing the selected bits with bits each having a randomly chosen value, andtransmitting the modified binary data to a data storage unit; and during the last transmission cycle, transmitting bits of the binary data that have not been transmitted during a previous transmission cycle, wherein the method includes:
randomly selecting a subset of bits from the selected bits;inverting the randomly selected subset of bits; andin the last transmission cycle, reinverting the randomly selected subset of inverted bits.