EP2079986A1

Navigation apparatus and information distribution system

Abstract

A CPU of a navigation apparatus stores public keys to which priorities are set and which are published by an information distribution center in a public key storage section. The CPU of the navigation apparatus extracts an electronic signature of distribution data which is distributed from the information distribution center and verifies the electronic signature by using only ‘valid’ public keys among the public keys in order of the priorities. The CPU of the navigation apparatus determines that the distribution data is valid information which is distributed from the information distribution center when the electronic signature passes verification.

Term

1.3 yearsto projected expiry

Projected expiry 15 January 2028, counted from filing; an application has no term until it is granted.

  1. Priority
  2. Filed
  3. Published
  4. Today
  5. Projected expiry

12 members in 7 offices

This recordMember, by publication datePriority claim

Priority claims3

Priority claims
DocumentOfficeKindDate
2007008450Japan
2007008450JapanA
2008050667JapanW

Members12

Family members, oldest first
DocumentOfficeKind
WO2008088063A1World Intellectual Property Organization (WIPO)A1
JP2008175648AJapanA
EP2079986A1This recordEuropean Patent Office (EPO)A1
CN101568803AChinaA
US2010070772A1United States of AmericaA1
EP2079986B1European Patent Office (EPO)B1
AT482376TAustriaT
ATE482376T1AustriaT1
DE602008002694D1GermanyD1
JP4633747B2JapanB2
US8261083B2United States of AmericaB2
CN101568803BChinaB