Electronic key system

An electronic key and program execution technology, applied in the field of electronic key systems, can solve problems such as leaving and driving a car

Active Publication Date: 2011-05-18
NTI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, according to the electronic key, if a malicious user finds a means to evade the authentication process, he may drive a car and leave.
[0004] This applies not only to the ignition switch of a car, but also to general vehicles,

Method used

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Examples

Experimental program
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Effect test

no. 1 Embodiment approach 》

[0058] In the present embodiment, as an example of the case where the present invention is implemented, a car A and an electronic key 2 that are paired, such as figure 1 Electronic key system shown. There are many pairs of the car A and the electronic key 2, but this embodiment takes one pair as an example.

[0059] The automobile A includes a program execution device 1 and an engine 3 . In the present embodiment, the engine 3 is started via the program execution device 1 by operating the electronic key 2 . The electronic key 2 is paired with the program execution device 1 mounted on the car A that is paired with the electronic key 2 .

[0060] In addition, the electronic key 2 in this embodiment is as figure 1 The shown shape simulates a classic key shape, but the electronic key 2 may be in other suitable shapes such as a card shape as long as it has a hardware structure described later.

[0061] figure 2 The hardware configurations of the program execution device 1 and...

Deformed example 1

[0089] Figure 6 An electronic key system according to Modification 1 is shown.

[0090] Such as Figure 6 As shown, the electronic key system of Modification 1 has the same configuration as that of the electronic key system of the first embodiment.

[0091] The electronic key system of Modification 1 differs from the electronic key system of the first embodiment in that the program execution device 1 of the electronic key system of Modification 1 is as follows: Figure 6 As shown, an interface 18 is provided.

[0092] Interface 18 is connected to bus 16 . In addition, the interface 18 is connected to the external ROM 4 by a cable in this embodiment, but it may be wireless. The external ROM 4 is fixed at a predetermined position among components constituting the automobile A. As shown in FIG. The parts to which the external ROM 4 is fixed are appropriately determined from the parts constituting the automobile A in consideration of the importance of functionality, the impo...

Deformed example 2

[0099] Figure 7 An electronic key system according to Modification 2 is shown.

[0100] Such as Figure 7 As shown, the electronic key system of Modification 2 has the same configuration as that of the electronic key system of the first embodiment.

[0101] The electronic key system of Modification 2 differs from the electronic key system of the first embodiment in that the program execution device 1 of the electronic key system of Modification 2 is as follows: Figure 7 As shown, an imaging unit 19 is provided.

[0102] The imaging unit 19 can read component information whose information can be read by image recognition. The imaging unit 19 is connected to the bus 16 . The imaging unit 19 is a barcode reader in the second modification, and the component information is a barcode in the second modification. The barcode 1 is printed irremovably on predetermined parts among the parts constituting the automobile A. As shown in FIG. The part on which the barcode is printed is ...

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PUM

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Abstract

Disclosed is an electronic key system that is safe and reduces the possibility of unauthorized execution of a program through a circumvention of authentication. A program execution device 1 placed in an automobile comprises an engine control device 14 that controls an engine 3, wherein the engine control device 14 comprises a program X that enables control of the engine 3. The program X recorded in the program execution device 1 is encrypted. Decoding information Y is required for decoding the program X. The decoding information Y is recorded in an electronic key 2 and is sent to the program execution device 1 if the program X is to be decoded. The program execution device 1 uses the received decoding information Y to decode the program X and then executes the program X to start up the engine. The program X cannot be decoded if the electronic key 2 does not contain the correct decoding information Y.

Description

technical field [0001] The present invention relates to an electronic key system including an electronic key and a program execution device that decrypts at least a part of encrypted programs using information held by the electronic key and executes the decrypted programs. Background technique [0002] As an ignition switch of an automobile, an electronic key excellent in safety and operability has been used in recent years. In the case of using an electronic key, the information in the electronic key is transmitted to a receiver mounted on the vehicle. Then, the information received by the receiver is compared with the information previously stored in the receiver to verify whether or not the key is a valid key. [0003] However, according to the electronic key, if a malicious user finds a means to avoid the authentication process, he may drive a car and leave. [0004] This is not limited to the ignition switch of a car, but also applies to general vehicles, automatic do...

Claims

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Application Information

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IPC IPC(8): E05B49/00B60R25/04G06F21/22B60R25/24
CPCB60R25/24B60R25/04G06F21/34
Inventor 中村贵利
Owner NTI
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