{
  "$type": "site.standard.document",
  "description": "An offline immobilizer ECU (6) reads an encryption key generation code (SC-A3) from an offline additional electronic key (2c) and generates an electronic key encryption key for the offline additional electronic key (2c) using the encryption key generation code (SC-A3) and a communication subject…",
  "path": "/patents/980957",
  "publishedAt": "2013-12-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60R25/24",
    "TOKAI RIKA CO LTD [JP]"
  ],
  "textContent": "An offline immobilizer ECU (6) reads an encryption key generation code (SC-A3) from an offline additional electronic key (2c) and generates an electronic key encryption key for the offline additional electronic key (2c) using the encryption key generation code (SC-A3) and a communication subject key encryption key (VK-A) held by the immobilizer ECU (6). The immobilizer ECU (6) stores, in a memory (69), the generated electronic key encryption key (VK-A) and a key ID code (KID-3) that is read from the offline additional electronic key (2c).",
  "title": "Electronic key registration system"
}