Abstract: The present invention provides a semiconductor device capable of detecting illegal data in secret data communications. A semiconductor device that transmits and receives data includes a specific bit extraction block that extracts first data from transmission data in accordance with a first rule, another specific bit extraction block that extracts second data from reception data in accordance with a second rule, and a bit pattern accumulation buffer that accumulates the first data and the second data. A scramble pattern used when scrambling the transmission data is generated by a combination of the first data and the second data accumulated in the bit pattern accumulation buffer.

Abstract: The present invention provides a semiconductor device capable of detecting illegal data in secret data communications. A semiconductor device that transmits and receives data includes a specific bit extraction block that extracts first data from transmission data in accordance with a first rule, another specific bit extraction block that extracts second data from reception data in accordance with a second rule, and a bit pattern accumulation buffer that accumulates the first data and the second data. A scramble pattern used when scrambling the transmission data is generated by a combination of the first data and the second data accumulated in the bit pattern accumulation buffer.

Abstract: Even when specific information (first information, second information) about individual sensors is inadequate to identify each of the individual sensors, whether all the sensors coupled to a semiconductor device are authentic can be determined. The semiconductor device can be electrically coupled with plural sensors and is configured as follows. Registration information is generated based on first combined information composed of plural combined pieces of first specific information respectively about plural sensors coupled to the semiconductor device when making registration. The semiconductor device generates determination target information based on second combined information composed of plural pieces of second specific information respectively about plural sensors coupled to the semiconductor device when making determination and compares the determination target information with the registration information.