{
  "$type": "site.standard.document",
  "description": "A method and apparatus are presented for authenticating a vehicle equipped with a passive keyless entry and start system. The method includes sending a request for unlock or ignition start from the key fob to a vehicle's network access device (NAD), sending a first challenge signal from the NAD to…",
  "path": "/patents/1240124",
  "publishedAt": "2019-08-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60R25/102",
    "TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC."
  ],
  "textContent": "A method and apparatus are presented for authenticating a vehicle equipped with a passive keyless entry and start system. The method includes sending a request for unlock or ignition start from the key fob to a vehicle's network access device (NAD), sending a first challenge signal from the NAD to the key fob, determining if the key fob is within range of the NAD, sending a second challenge signal from the NAD to the mobile device, determining if the mobile device is within range of the NAD, and sending a warning to the mobile device when the key fob or mobile device is not within range of the NAD.",
  "title": "METHOD TO PROVIDE WARNING TO RELAY ATTACKS ON KEYLESS ENTRY AND START SYSTEMS"
}