{
  "$type": "site.standard.document",
  "description": "Provided is a key management method to secure security in an onboard network system having multiple electronic control units storing a shared key. In the key management method of the onboard network system including multiple electronic units (ECUs) that perform communication by frames via a bus, a…",
  "path": "/patents/1422053",
  "publishedAt": "2023-09-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60R16/0231",
    "PANASONIC IP CORP AMERICA [US]"
  ],
  "textContent": "Provided is a key management method to secure security in an onboard network system having multiple electronic control units storing a shared key. In the key management method of the onboard network system including multiple electronic units (ECUs) that perform communication by frames via a bus, a master ECU (400) stores a shared key to be mutually shared with one or more ECUs (100a through 100d). Each of the ECUs (100a through 100d) acquire a session key by communication with the master ECU (400) based on the stored shared key, and after this acquisition, executes encryption processing regarding a frame transmitted or received via the bus, using this session key. In a case where a vehicle in which the onboard network system is installed is in a particular state, the master ECU (400) executes inspection (e.g., steps S1201, S1203) of a security state of the shared key stored by the ECU (100a) or the like.",
  "title": "KEY MANAGEMENT METHOD, VEHICLE-MOUNTED NETWORK SYSTEM, AND KEY MANAGEMENT DEVICE"
}