Vehicle antitheft system

• US 8,051,286 B2
• Filed: 10/19/2005
• Issued: 11/01/2011
• Est. Priority Date: 10/21/2004
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Kaihori, Hiroki
• Primary Examiner(s): Shiferaw; Eleni
• Assistant Examiner(s): WILLIAMS, JEFFERY L
• Application Number:
  US10/578,638
• Publication Number:
  US 20070067632A1
• Time in Patent Office: 2,204 Days
• Field of Search: None
• US Class Current: 713/169
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: H04L 2209/84 Vehicles
• CPC Class Codes: H04L 9/3273 for mutual authentication network architectures or network communication protocols for achieving mutual authentication in a packet data network H04L63/0869

Abstract

A vehicle antitheft system includes an immobilizer unit and a portable unit. Each of the units includes an antenna, a communication part, a data processor, and storages. The immobilizer unit and the portable unit authenticate each other, based on a highly encrypted authentication method, using at least first data for mutual authentication. Thereafter, the first data for mutual authentication or second data for mutual authentication different from the first data for mutual authentication is stored in the storages of the immobilizer unit and the portable unit.

Claims

1. A vehicle antitheft system comprising:

an immobilizer unit including;

a first data processor;

a memory storing a first set of computer instructions;

a first communication part connected with the first data processor;

a first antenna connected with the first communication part;

a first storage connected with the first data processor, the first storage preliminarily storing first data for mutual authentication; and

a second storage connected with the first data processor;

the immobilizer unit further includes an information reception part connected with the first data processor;

and

a portable unit including;

a second data processor;

a memory storing a second set of computer instructions;

a second communication part connected with the second data processor;

a second antenna connected with the second communication part;

a third storage connected with the second data processor, the third storage preliminarily storing the first data for mutual authentication; and

a fourth storage connected with the second data processor, the fourth storage preliminarily storing second data for mutual authentication different from the first data for mutual authentication;

wherein the first data processor executes the first set of computer instructions and the second data processor executes the second set of computer instructions to perform the following functions comprising;

when a first instruction is fed into the information reception part, the first data processor and the second data processor authenticate each other by an authentication comprising;

(1) the first data processor transmitting via the first antenna an encrypted data based on the first data for mutual authentication stored in the first storage and (2) the second data processor receiving the encrypted data via the second antenna, decrypting the encrypted data and comparing the decrypted data to the first data for mutual authentication stored in the third storage; and

the first data processor and the second data processor, responsive to the authentication between the first data processor and the second data processor, interchange the second data for mutual authentication to set the portable unit for the immobilizer unit in a way comprising;

     1) the second data processor transmitting the second data for mutual authentication stored in the fourth storage via the second antenna,

     2) the first data processor further storing, into the second storage, the second data for mutual authentication received via the first antenna and transmitting the second data for mutual authentication stored in the second storage via the first antenna, and

     3) the second data processor further storing, into the third storage, the second data for mutual authentication received via the second antenna.

2. The vehicle antitheft system according to claim 1, wherein, upon input of a second instruction into the information reception part, when both of data stored in the second storage and the third storage are the second data for mutual authentication, either the first data processor generates and stores into the second storage first accumulation data different from the second data for mutual authentication, or the second data processor generates and stores into the third storage the first accumulation data;

and

when both of data stored in the second storage and the third storage are identical to the first data for mutual authentication, either the first data processor generates and stores into the second storage second accumulation data different from the first data for mutual authentication, or the second data processor generates and stores into the third storage second accumulation data different from the first data for mutual authentication.

3. The vehicle antitheft system according to claim 1, wherein, upon input of a second instruction into the information reception part, when both of data stored in the second storage and the third storage are the second data for mutual authentication, the first data processor transmits the first data for mutual authentication stored in the first storage via the first antenna, and the second data processor stores, into the third storage, the first data for mutual authentication received via the second antenna;

and

when both of data stored in the second storage and the third storage are identical to the first data for mutual authentication, either the first data processor generates and stores into the second storage second accumulation data different from the first data for mutual authentication, or the second data processor generates and stores into the third storage second accumulation data different from the first data for mutual authentication.

4. The vehicle antitheft system according to claim 1, wherein the portable unit further has a fifth storage preliminarily storing an ID code, and the first data processor and the second data processor authenticate each other also using the ID code.

5. The vehicle antitheft system according to claim 4, wherein the immobilizer unit further has a sixth storage, the second data processor transmits, via the second antenna, the ID code stored in the fifth storage, and the first data processor stores, into the sixth storage, the ID code received via the first antenna.

6. The vehicle antitheft system according to claim 5, wherein upon input of a second instruction into the information reception part, the first data processor generates third accumulation data different from the ID code stored in the sixth storage, and stores the third accumulation data into the sixth storage.

7. A vehicle antitheft system comprising:

an immobilizer unit including;

a first data processor;

a memory storing a first set of computer instructions;

a first communication part connected with the first data processor;

a first antenna connected with the first communication part;

a first storage connected with the first data processor, the first storage preliminarily storing first data for mutual authentication; and

a second storage connected with the first data processor, the second storage preliminarily storing second data for mutual authentication different from the first data for mutual authentication; and

the immobilizer unit further includes an information reception part connected with the first data processor; and

a portable unit including;

a second data processor;

a memory storing a second set of computer instructions;

a second communication part connected with the second data processor;

a second antenna connected with the second communication part; and

a third storage connected with the second data processor, the third storage preliminarily storing the first data for mutual authentication;

wherein the first data processor executes the first set of computer instructions and the second data processor executes the second set of computer instructions to perform the following functions comprising;

when a first instruction is fed into the information reception part, the first data processor and the second data processor authenticate each other by an authentication comprising;

(1) the first data processor transmitting via the first antenna an encrypted data based on the first data for mutual authentication stored in the first storage and (2) the second data processor receiving the encrypted data via the second antenna, decrypting the encrypted data and comparing the decrypted data to the first data for mutual authentication stored in the third storage; and

the first data processor and the second data processor, responsive to the authentication between the first data processor and the second data processor, interchange the second data for mutual authentication to set the portable unit for the immobilizer unit in a way comprising;

     1) the first data processor transmitting the second data for mutual authentication that is stored in the second storage via the first antenna and

     2) the second data processor storing, into the third storage, the second data for mutual authentication received via the second antenna.

8. The vehicle antitheft system according to claim 7, wherein, upon input of a second instruction into the information reception part, when both of data stored in the second storage and the third storage are the second data for mutual authentication, either the first data processor generates and stores into the second storage first accumulation data different from the second data for mutual authentication, or the second data processor generates and stores into the third storage the first accumulation data;

and

when both of data stored in the second storage and the third storage are identical to the first data for mutual authentication, either the first data processor generates and stores into the second storage second accumulation data different from the first data for mutual authentication, or the second data processor generates and stores into the third storage second accumulation data different from the first data for mutual authentication.

9. The vehicle antitheft system according to claim 7, wherein, upon input of a second instruction into the information reception part, when both of data stored in the second storage and the third storage are the second data for mutual authentication, the first data processor transmits the first data for mutual authentication stored in the first storage via the first antenna, and the second data processor stores, into the third storage, the first data for mutual authentication received via the second antenna;

and

when both of data stored in the second storage and the third storage are identical to the first data for mutual authentication, either the first data processor generates and stores into the second storage second accumulation data different from the first data for mutual authentication, or the second data processor generates and stores into the third storage second accumulation data different from the first data for mutual authentication.

10. The vehicle antitheft system according to claim 7, wherein the portable unit further has a fifth storage preliminarily storing an ID code, and the first data processor and the second data processor authenticate each other also using the ID code.

11. The vehicle antitheft system according to claim 10, wherein the immobilizer unit further has a sixth storage, the second data processor transmits, via the second antenna, the ID code stored in the fifth storage, and the first data processor stores, into the sixth storage, the ID code received via the first antenna.

12. The vehicle antitheft system according to claim 11, wherein upon input of a second instruction into the information reception part, the first data processor generates third accumulation data different from the ID code stored in the sixth storage, and stores the third accumulation data into the sixth storage.

13. A vehicle antitheft system comprising:

an immobilizer unit including;

a first data processor

a memory storing a first set of computer instructions;

a first communication part connected with the first data processor;

a first antenna connected with the first communication part;

a first storage connected with the first data processor, the first storage preliminarily storing first data for mutual authentication; and

a second storage connected with the first data processor; and

the immobilizer unit further includes an information reception part connected with the first data processor; and

a portable unit including;

a second data processor;

a memory storing a second set of computer instructions;

a second communication part connected with the second data processor;

a second antenna connected with the second communication part; and

a third storage connected with the second data processor, the third storage preliminarily storing the first data for mutual authentication;

wherein the first data processor executes the first set of computer instructions and the second data processor executes the second set of computer instructions to perform the following functions comprising;

when a first instruction is fed into the information reception part, the first data processor and the second data processor authenticate each other by an authentication comprising;

(1) the first data processor transmitting via the first antenna an encrypted data based on the first data for mutual authentication stored in the first storage and (2) the second data processor receiving the encrypted data via the second antenna, decrypting the encrypted data and comparing the decrypted data to the first data for mutual authentication stored in the third storage; and

the first data processor and the second data processor, responsive to the authentication between the first data processor and the second data processor, interchange second data for mutual authentication to set the portable unit for the immobilizer unit in a way comprising;

     1) the first data processor requesting the second data processor via the first antenna to generate the second data for mutual authentication which is different from the first data for mutual authentication,

     2) responsive to the request from the first data processor, the second data processor further generating, storing into the third storage, and transmitting via the second antenna, the second data for mutual authentication,

     3) the first data processor storing, into the second storage, the second data for mutual authentication received via the first antenna and transmitting the second data for mutual authentication stored in the second storage via the first antenna and

     4) the second data processor further storing, into the third storage, the second data for mutual authentication received via the second antenna.

14. The vehicle antitheft system according to claim 13, wherein, upon input of a second instruction into the information reception part, when both of data stored in the second storage and the third storage are the second data for mutual authentication, either the first data processor generates and stores into the second storage first accumulation data different from the second data for mutual authentication, or the second data processor generates and stores into the third storage the first accumulation data;

and

when both of data stored in the second storage and the third storage are identical to the first data for mutual authentication, either the first data processor generates and stores into the second storage second accumulation data different from the first data for mutual authentication, or the second data processor generates and stores into the third storage second accumulation data different from the first data for mutual authentication.

15. The vehicle antitheft system according to claim 13, wherein, upon input of a second instruction into the information reception part, when both of data stored in the second storage and the third storage are the second data for mutual authentication, the first data processor transmits the first data for mutual authentication stored in the first storage via the first antenna, and the second data processor stores, into the third storage, the first data for mutual authentication received via the second antenna;

and

when both of data stored in the second storage and the third storage are identical to the first data for mutual authentication, either the first data processor generates and stores into the second storage second accumulation data different from the first data for mutual authentication, or the second data processor generates and stores into the third storage second accumulation data different from the first data for mutual authentication.

16. The vehicle antitheft system according to claim 13, wherein the portable unit further has a fifth storage preliminarily storing an ID code, and the first data processor and the second data processor authenticate each other also using the ID code.

17. The vehicle antitheft system according to claim 16, wherein the immobilizer unit further has a sixth storage, the second data processor transmits, via the second antenna, the ID code stored in the fifth storage, and the first data processor stores, into the sixth storage, the ID code received via the first antenna.

18. The vehicle antitheft system according to claim 17, wherein upon input of a second instruction into the information reception part, the first data processor generates third accumulation data different from the ID code stored in the sixth storage, and stores the third accumulation data into the sixth storage.

19. A vehicle antitheft system comprising:

an immobilizer unit including;

a first data processor;

a memory storing a first set of computer instructions;

a first communication part connected with the first data processor;

a first antenna connected with the first communication part;

a first storage connected with the first data processor, the first storage preliminarily storing first data for mutual authentication; and

a second storage connected with the first data processor; and

the immobilizer unit further includes an information reception part connected with the first data processor; and

a portable unit including;

a second data processor;

a memory storing a second set of computer instructions;

a second communication part connected with the second data processor;

a second antenna connected with the second communication part; and

a third storage connected with the second data processor, the third storage preliminarily storing the first data for mutual authentication;

wherein the first data processor executes the first set of computer instructions and the second data processor executes the second set of computer instructions to perform the following functions comprising;

when a first instruction is fed into the information reception part, the first data processor and the second data processor authenticate each other by an authentication comprising;

(1) the first data processor transmitting via the first antenna an encrypted data based on the first data for mutual authentication stored in the first storage and (2) the second data processor receiving the encrypted data via the second antenna, decrypting the encrypted data and comparing the decrypted data to the first data for mutual authentication stored in the third storage; and

the first data processor and the second data processor, responsive to the authentication between the first data processor and the second data processor, interchange second data for mutual authentication to set the portable unit for the immobilizer unit in a way comprising;

     1) the first data processor generating, storing into the second storage, and transmitting via the first antenna, the second data for mutual authentication which is different from the first data for mutual authentication and

     2) the second data processor storing, into the third storage, the second data for mutual authentication received via the second antenna.

20. The vehicle antitheft system according to claim 19, wherein, upon input of a second instruction into the information reception part, when both of data stored in the second storage and the third storage are the second data for mutual authentication, either the first data processor generates and stores into the second storage first accumulation data different from the second data for mutual authentication, or the second data processor generates and stores into the third storage the first accumulation data;

and

when both of data stored in the second storage and the third storage are identical to the first data for mutual authentication, either the first data processor generates and stores into the second storage second accumulation data different from the first data for mutual authentication, or the second data processor generates and stores into the third storage second accumulation data different from the first data for mutual authentication.

21. The vehicle antitheft system according to claim 19, wherein, upon input of a second instruction into the information reception part, when both of data stored in the second storage and the third storage are the second data for mutual authentication, the first data processor transmits the first data for mutual authentication stored in the first storage via the first antenna, and the second data processor stores, into the third storage, the first data for mutual authentication received via the second antenna;

and

when both of data stored in the second storage and the third storage are identical to the first data for mutual authentication, either the first data processor generates and stores into the second storage second accumulation data different from the first data for mutual authentication, or the second data processor generates and stores into the third storage second accumulation data different from the first data for mutual authentication.

22. The vehicle antitheft system according to claim 19, wherein the portable unit further has a fifth storage preliminarily storing an ID code, and the first data processor and the second data processor authenticate each other also using the ID code.

23. The vehicle antitheft system according to claim 22, wherein the immobilizer unit further has a sixth storage, the second data processor transmits, via the second antenna, the ID code stored in the fifth storage, and the first data processor stores, into the sixth storage, the ID code received via the first antenna.

24. The vehicle antitheft system according to claim 23, wherein upon input of a second instruction into the information reception part, the first data processor generates third accumulation data different from the ID code stored in the sixth storage, and stores the third accumulation data into the sixth storage.