Handling device and method of security data

• US 20040083374A1
• Filed: 10/16/2003
• Published: 04/29/2004
• Est. Priority Date: 10/16/2002
• Status: Active Grant

• Current Assignee: Alps Alpine Co., Ltd.
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Sugawara, Takehito
• Granted Patent: US 7,426,275 B2
• Time in Patent Office: Days
• US Class Current: 713/189
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G07C 2009/0023 with encription of the transmittted data signal
• CPC Class Codes: G07C 2009/00412 the transmitted data signal being encrypted
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

A handling device of security data (for example, a portable unit ID) of a vehicle comprises: an in-vehicle unit having a portable unit authenticating unit, an EEPROM, a ROM, and a controller; a vehicle having the in-vehicle unit, a door locking mechanism, and a communication unit; and a portable unit for locking or unlocking the door locking mechanism of the vehicle. In the above device, an encryption unit for encrypting the security data with a cipher key is interposed between the controller and the EEPROM, the security data (portable unit ID) is encrypted with the cipher key and stored into the EEPROM, according to the instruction from the controller based on the authentication result of the portable unit authenticating unit, and the cipher key is stored into the ROM.

Claims

1. A handling device of security data comprising:

an in-vehicle unit having a portable unit authenticating unit, a nonvolatile memory, and a controller;

a vehicle having the in-vehicle unit, an in-vehicle system, and a communication unit; and

a portable unit for giving a control instruction to the in-vehicle system of the vehicle through communication with the communication unit, in which

an encryption unit for encrypting the security data of the vehicle with a cipher key is interposed between the controller and the nonvolatile memory of the in-vehicle unit, and

the security data is encrypted with the cipher key and stored into the nonvolatile memory according to the instruction from the controller.

2. The handling device of security data, according to claim 1, in which

the cipher key is stored in another nonvolatile memory than the nonvolatile memory storing an encrypted signal of the security data.

3. The handling device of security data, according to claim 2, in which

the security data includes a portable unit ID, the nonvolatile memory is an EEPROM, and the other nonvolatile memory is a ROM.

4. The handling device of security data, according to claim 3, in which

an in-vehicle unit ID is stored in the EEPROM in addition to the portable unit ID.

5. A handling method of security data of a vehicle provided with an in-vehicle unit having a portable unit authenticating unit, a nonvolatile memory, and a controller, a vehicle having the in-vehicle unit, a door locking mechanism, and a communication unit, and a portable unit for locking or unlocking the door locking mechanism of the vehicle through communication with the communication unit, the method comprising

a step of encrypting the security data with a cipher key in an encryption unit provided between the controller and the nonvolatile memory of the in-vehicle unit, and

a step of storing the encrypted signal into the nonvolatile memory and storing the cipher key into another nonvolatile memory than the above nonvolatile memory.