Vehicle network system

摘要

In a vehicle network system, a plurality of ECUs are network-connected. The plurality of ECUs include a first ECU that has set therein a secret key from among the secret key and a public key that form a pair and are set on the basis of initialization processing performed when the vehicle network system is created, and a second ECU that has set therein the public key. The second ECU adds, to a transmission signal, an authentication keyword created from the public key and information capable of specifying the second ECU and transmits the transmission signal with the authentication keyword added thereto to the network. The first ECU acquires the authentication keyword and estimates the reliability of the communication signal on the basis of the acquired authentication keyword and the secret key.

主权项

1. A vehicle network system, comprising:
a plurality of control circuits provided on a vehicle and network-connected to each other communicatively to communicate via a control area network (CAN) protocol format, the plurality of control circuits including: a first control circuit that has a secret key from among the secret key and a public key that form a pair and are set by execution of initialization processing for activating the system; and a second control circuit that has the public key, wherein a second identifier is allocated to the second control circuit, the second identifier is an identifier is that is added to a communication having the CAN protocol format, the second control circuit is configured to create authentication information from the public key and information specifying the second control circuit, add the authentication information and the second identifier to the communication which is to be transmitted to another control circuit, and transmit the communication with the authentication information added to the first control circuit via the network; and the first control circuit is configured to acquire the authentication information that has been added to the communication transmitted from the second control circuit and estimate reliability of the communication on the basis of the acquired authentication information and the secret key, the first control circuit broadcasts an indication that the communication from the second control circuit is not authorized when the communication is determined to be unreliable.