{
  "$type": "site.standard.document",
  "description": "A positional information storage system that stores and verifies positional information of a mobile terminal apparatus. The positional information storage system stores (i) the positional information, (ii) time information, and (iii) signature data that is generated by placing a digital signature…",
  "path": "/patents/1092572",
  "publishedAt": "2003-10-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/26",
    "MATSUSHITA ELECTRIC INDUSTRIAL CO LTD [JP]"
  ],
  "textContent": "A positional information storage system that stores and verifies positional information of a mobile terminal apparatus. The positional information storage system stores (i) the positional information, (ii) time information, and (iii) signature data that is generated by placing a digital signature on a combination of the time information and the positional information of the mobile terminal apparatus only if a user of the mobile terminal apparatus is successfully authenticated. The positional information storage system also verifies whether the signature data is authentic. With this construction, it is possible to authenticate a person carrying the mobile terminal apparatus, and to verify whether data to be stored in the memory has been tampered.",
  "title": "Positional information storage system and method, semiconductor memory, and program"
}