Method for updating map data used in on-vehicle navigation apparatus, map data update system, authentication key generation apparatus and navigation apparatus

• US 20050159885A1
• Filed: 01/19/2005
• Published: 07/21/2005
• Est. Priority Date: 01/20/2004
• Status: Active Grant

• Current Assignee: Clarion Co., Ltd. (Faurecia SA)
• Original Assignee: Xanavi Informatics Corporation (Hitachi, Ltd.)
• Inventors: Nomura, Takashi
• Granted Patent: US 7,577,520 B2
• Time in Patent Office: Days
• US Class Current: 701/208
• CPC Class Codes: G01C 21/3889 Transmission of selected map data, e.g. depending on route
• CPC Class Codes: G01C 21/3896 Transmission of map data from central databases
• CPC Class Codes: H04L 2209/84 Vehicles
• CPC Class Codes: H04L 2463/081 applying self-generating credentials, e.g. instead of receiving credentials from an authority or from another peer, the credentials are generated at the entity itself cryptographic mechanisms or cryptographic arrangements for generation of secret information including derivation or calculation of cryptographic keys or passwords H04L9/0861
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 9/083 involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
• CPC Class Codes: H04L 9/0866 involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics

Abstract

In a map data update method for updating map data used in an on-vehicle navigation apparatus by installing update map data, an authentication key is generated based upon an apparatus-inherent ID assigned in correspondence to the navigation apparatus and the use of update map data installed in the navigation apparatus is enabled or disabled by verifying the authentication key assigned to the navigation apparatus.

Claims

1. A map data update method for updating map data used in an on-vehicle navigation apparatus by installing an update map data, comprising:

generating an authentication key based upon an apparatus-inherent ID assigned each of the navigation apparatus; and

enabling or disabling a use of the update map data installed in the navigation apparatus by verifying the authentication key assigned to the navigation apparatus.

2. A map data update method according to claim 1, wherein:

the authentication key is generated based upon the apparatus ID and a version of the update map data.

3. A map data update method according to claim 2, wherein:

the navigation apparatus obtains the authentication key generated outside based upon the apparatus ID, the version of the update map data and a specified map area;

the navigation apparatus calculates a reference key to be referenced against the authentication key based upon information indicating the apparatus ID, which is held at the navigation apparatus, and update map data version information and map area information recorded in the update map data;

the navigation apparatus makes a decision as to whether or not the authentication key is correct by comparing the authentication key having been obtained with the reference key; and

the navigation apparatus enables the use of the update map data over the specified map area if the authentication key is judged to be correct or disables the use of the update map data if the authentication key is judged to be incorrect.

4. A map data update method according to claim 1, wherein:

the navigation apparatus enables the use of the update map data during a predetermined period of time regardless of whether or not the authentication key is obtained and disables the use of the update map data unless the authentication key is obtained after the predetermined period of time expires.

5. A map data update method according to claim 1, wherein:

the authentication key is generated also based upon a user-inherent ID assigned to each user in advance.

6. A map data update system, comprising:

an authentication key generation apparatus that generates the authentication key; and

a navigation apparatus, wherein;

the authentication key generation apparatus and the navigation apparatus execute a map data update method according to claim 1.

7. An authentication key generation apparatus used in a map data update system according to claim 6.

8. A navigation apparatus used in a map data update system according to claim 6.