JP2002281026A - Living body information collation system security device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reliable living body information collation system security device capable of improving security on communication, and incapable of reading of decoding living body information. SOLUTION: A portable living body information reader 20 is provided with a living body information acquiring means 22 and an enciphering means 23, and an on-vehicle living body information collator 30 is provided with a cipher information holding means 34 for holding decipherment information for deciphering the cipher, a cipher deciphering means 33 for deciphering the biological information received from the living body information reader 20 by using the decipherment information, a characteristic extracting means 35 for extracting characteristics from the deciphered living body information, a characteristic storing means 36 for holding the preliminarily registered characteristics of living body information, and a characteristic collating means 38 for collating the characteristics of the living body information held by the characteristic storing means 36 with the characteristics of the living body information extracted by the characteristic extracting means 35. Then, the living body information acquired by the living body information reader 20 is enciphered and transmitted to the living body information collating unit 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention compares and compares biometric information such as a user's fingerprint with registered biometric information,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biometric information collating security device for opening / locking and starting a vehicle.

[0002]

2. Description of the Related Art A keyless entry device which transmits an encryption code from a transmitter for the purpose of preventing the vehicle from being stolen, and a receiver provided in the vehicle receives the code and verifies the code to unlock a door lock, Various techniques have been proposed for an immobilizer device in which the engine is not started unless the ID code is given. Also, a system using fingerprint information as biometric information without using an ID code as an advanced keyless entry system has been proposed. For example, a technology disclosed in Japanese Patent Application Laid-Open No. 11-93478 is one example. This technique has been proposed as a keyless entry system suitable for a commuter system that uses a plurality of vehicles in common.

FIGS. 7 and 8 show a keyless entry system using fingerprint information disclosed in this publication, that is, FIG.
FIG. 7 is a conceptual diagram and FIG. 8 is a block diagram of a system for explaining a conventional biometric information collating security device. Referring to FIG. 7, a keyless transmitter 1 is provided with a fingerprint sensor 2 for reading a fingerprint. It is configured to be transmitted from the device 1 to the keyless receiver 4 mounted on the vehicle 3.

As shown in FIG. 8, a keyless transmitter 1 has a transmitting section 5 and an antenna 6 in addition to a fingerprint sensor 2, and fingerprint information transmitted from the transmitting section 5 is transmitted to a keyless receiver 4.
Is received by the receiving unit 8 from the antenna 7 and sent to the feature point data extracting unit 9 for extracting the feature points of the fingerprint information. On the other hand, fingerprint information of the vehicle user is stored in the center station 10 of the commuter system, and this information is obtained by the telephone 11 of the keyless receiver 4 and under the control of the registration control unit 12, the fingerprint information of the vehicle user is stored. The feature points are stored in the feature point data storage unit 13.

When the fingerprint information is input to the feature point data extraction unit 9, the feature point is collated with the fingerprint information stored in the feature point data storage unit 13 by the collation unit 14, and the feature point data storage unit 13 If there is data that matches, a match signal is sent to the control device 15. The control device 15 operates the door lock driving device 16 in accordance with the coincidence signal to release the door lock, release the immobilizer device to make it operable and, as shown in FIG. Necessary operation of each device is enabled, and each device necessary for driving the vehicle is set to a registered user-specific setting value.

[0006]

As described above, in the conventional keyless entry system using fingerprint information, the fingerprint information for performing fingerprint collation is transmitted to the keyless transmitter 1.
Since the communication is performed by wireless communication between the communication device and the keyless receiver 4, the wireless communication is intercepted and data analysis is performed. In addition, if the keyless transmitter is lost, re-procurement requires a considerable amount of time, during which time the function has to be inactivated and the security has to be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is possible to easily perform a collation operation of biometric information such as a fingerprint and improve security in communication, and to improve a vehicle side. It is another object of the present invention to obtain a highly reliable biometric information collating security device that cannot read and decode biometric information.

[0008]

A biometric information collating security device according to the present invention has a biometric information acquiring means and an encrypting means, and a biometric information reader for encrypting and transmitting the acquired biometric information; Cryptographic information holding means for holding decryption information for decrypting a cipher, cipher decoding means for decrypting biometric information received from a biometric information reader with the decryption information, and extracting features from the decrypted biometric information A feature extraction unit, a feature storage unit that holds features of biometric information registered in advance, and a feature matching unit that matches features of the biometric information held by the feature storage unit with features of the biometric information extracted by the feature extraction unit. And a biometric information matching device having means.

[0009] Further, the encrypted information is held in the encrypted information holding means, and when the biometric information reader is operated, the biometric information collator operates, and the encrypted information is read and transmitted to the biometric information reader. The encryption means of the biological information reader encrypts the biological information based on the received encrypted information, and transmits the encrypted biological information to the biological information collator. Further, the encryption information holding means has a random number generation means and holds a plurality of pieces of encryption information, so that different encryption information is read out corresponding to the random numbers generated by the random number generation means.

[0010] Furthermore, a public key is used for the encryption information. Further, the cryptographic information holding unit, the decryption unit, the feature extraction unit, the feature storage unit, and the feature comparison unit provided in the biometric information collator are configured as an integrated logic element including an algorithm. It was made. Furthermore, it is configured such that biometric information can be transmitted from a plurality of biometric information readers to a plurality of biometric information verifiers using a public key.

The biological information reader may be a mobile phone,
Alternatively, it is designed to be incorporated in a PHS.
Further, a biometric information matching device is mounted on the vehicle, and the vehicle is operated based on a result of the matching of the biometric information.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 5 illustrate a biometric information collating security device according to a first embodiment of the present invention. FIG. 1 is a block diagram showing a configuration of the device, FIG. 2 is a conceptual diagram showing a use state, and FIG. 3 is an explanatory diagram for explaining the flow of operation at the time of unlocking / locking, and FIGS.
Is an explanatory diagram illustrating a flow when a user performs registration. In this embodiment, a case where fingerprint information is used as biometric information will be described as an example. A biometric information reader 20 in FIGS. 1 and 2 includes an image sensor (fingerprint sensor) 21 for reading a fingerprint, and a biometric information acquisition unit 22 for acquiring fingerprint information based on information from the fingerprint sensor 21.
An encryption unit 23 for encrypting the fingerprint information acquired by the biometric information acquisition unit 22, and an encryption unit 23 as described later.
Information holding means 2 for giving encryption information to a user and encrypting it
4, a wireless communication unit 25 and a communication antenna 26 for transmitting the encrypted fingerprint information to the vehicle 3, an information display unit 27 also serving as a touch panel, and an operation control unit 28 for controlling these. It is configured.

The biological information collator 30 mounted on the vehicle 3 includes a receiving antenna 31 and a wireless communication unit 32.
And a decryption means 33 for decrypting the received encryption, and, as will be described later, holding the encryption information and generating and outputting the encryption by a random number, and holding the decryption information. A cryptographic information holding unit 34 to be provided to the decryption unit 33; a feature extraction unit 35 for extracting a feature from the decrypted fingerprint information; a feature registration unit 37 for registering the feature of the extracted fingerprint information in a feature storage unit 36; Feature comparing means 38 for comparing and comparing the obtained fingerprint information with newly obtained fingerprint information, and comprehensive determining means 39 for determining the comparison and matching result.
A communication interface 40 for outputting a determination result;
Door opening / locking control means 41 for locking / unlocking a vehicle door by an output of the communication interface 40;
And an operation control means 42 for controlling them. Of these, the decryption means 33 to the feature collation means 3
Up to 8 is a logic element 43 for encryption / decryption including an algorithm.
It is configured as

FIG. 3 schematically shows the operation and operation of the biometric information collating security device according to the first embodiment of the present invention constructed as described above. When the user of the vehicle uses the vehicle, the fingerprint sensor 21 having the operation button function of the biological information reader 20 being carried is pressed ((1) in the figure). As a result, the biometric information acquisition unit 22 reads the fingerprint information, the encryption information holding unit 24 provides the encryption information to the encryption unit 23 as described later, and the encryption unit 23 encrypts the fingerprint information. The encrypted fingerprint information is transmitted to the biometric information collator 30 mounted on the vehicle 3 by the wireless communication means 25 and the antenna 26 ((2) in the figure).

The biometric information collator 30 receives the encrypted information, and the decryption means 33 decrypts the code based on the decryption information of the encryption information holding means 34, and the characteristic extraction means 35
Is given as fingerprint information. The feature extracting unit 35 extracts a feature of the fingerprint from the fingerprint information and holds the feature. The stored information is compared with the information registered in the feature storage means 36 in advance by the feature collation means 38 ((3) in the figure) as described later, and the comparison result is determined by the comprehensive determination means 39, and If recognized, the door opening / locking control means 41 operates to open / lock the door. If the user is not recognized, the door opening / locking control means 41 does not operate ((4) in the figure).

The operation by the fingerprint information is such that the operation of the user is simpler and the operation is completed in a shorter time than in the case of using the ID code. In the biometric information collating security device according to the first embodiment,
The portable biometric information reader 20 has only a function of simply reading biometric information, and the feature extracting means 35 which requires a high-speed processor for extracting the features of fingerprint information is used as a biometric information collating unit mounted on a vehicle having a large capacity power supply. Provided on the vessel 30 side,
The power load on the biological information reader 20 is reduced to extend the life of the power supply. In addition, the read biometric information is encrypted and transmitted on the biometric information reader 20 side, thereby preventing a decrease in security due to interception of communication. However, in order to further improve security, encryption is performed. This is performed as follows.

First, when the fingerprint sensor 21 having the operation button function of the biometric information reader 20 is pressed, this signal is transmitted and the biometric information collator 30 is operated. The encrypted information is provided to the biological information reader 20. The encryption information holding unit 24 of the biometric information reader 20 holds the encryption information and encrypts the fingerprint information by the encryption unit 23. The cryptographic information holding means 34 of the biometric information collator 30 has a random number generation function and also holds a plurality of pieces of encrypted information, and the cryptographic information transmitted from the biometric information collator 30 to the biometric information reader 20. For the encrypted information, a different random number is generated for each operation of the biometric information reader 20, different encrypted information corresponding to the random number is read, transmitted to the biometric information reader 20, and the transmitted encrypted The encrypted information is stored as decrypted information in the encrypted information holding means 34 and is used for decrypting the fingerprint code sent from the biometric information reader 20.

Further, the following method can be adopted. That is, when the biometric information reader 20 is operated for unlocking or locking, the encrypted information output from the biometric information collator 30 based on the random number changed each time is used as the biometric information reader as a public key. 20 and at the same time, the decrypted signal of the secret key is held in the encrypted information holding means 34 of the biometric information collator 30. The biometric information reader 20 stores the received encryption information of the public key in the cryptographic information storage means 24, encrypts the fingerprint information by the encryption means 23,
Send to 0. The biometric information collator 30 decrypts the fingerprint information by decrypting the decrypted signal of the stored private key. When the fingerprint information is decrypted, the fingerprint is collated by the feature extraction means 35, the feature storage means 36, and the feature collation means 38, and is judged by the comprehensive judgment means 39.

By performing the encryption as described above, every time the user performs, for example, the operation of unlocking / locking the vehicle, different encrypted information is provided from the biometric information collator 30 to the biometric information reader 20. As a result, the fingerprint information transmitted from the biometric information reader 20 is encrypted with different encryption information for each operation, so that even if the signal content is intercepted, it cannot be decrypted, and Since the key can be decrypted only by the paired secret key, high reliability can be obtained.

Further, as described above, the decryption means 33
To the feature matching means 38 are configured as a cryptographic decryption logic element 43 including an algorithm. The cryptographic decryption logic element 43 is commonly called a SAM (Security A).
The SAM is configured to be converted into non-encrypted fingerprint information to perform feature extraction and fingerprint collation in the SAM. Since the data existing in the SAM is confined in the chip of the logic element and can be configured so as not to be read from the outside, reading of fingerprint information from the biometric information collator 30 becomes extremely difficult, High reliability is maintained.

In this biometric information collating security device, a user's fingerprint is registered as follows. FIGS. 4 and 5 show the flow of registration. First, the method of FIG. 4 shows a case where registration is performed using an identification code. Wireless communication means 25 of biological information reader 20
It is assumed that the wireless communication unit 32 of the biometric information matching unit 30 is, for example, a short-range wireless communication Bluetooth specification communication unit. The communication means of the Bluetooth specification includes a mode in which communication can be performed with any Bluetooth specification communication means, a mode in which communication can be performed when the device types match, and a mode in which communication can be performed when the IDs match. The mode is such that communication is also possible with communication means of the Bluetooth specification.

The biometric information collator 30 is provided with a switch for setting an identification code. When the switch is operated, the identification code is stored in advance by operating the biometric information reader 20. In registering a user, the biometric information reader 20 is used to input an identification code as a user registration setting mode. For example, as shown in FIG. Then, when the registrant presses the fingerprint sensor 21, the fingerprint is transmitted. To register, after sending your fingerprint,
Further, the fingerprint is transmitted again to confirm the recognizability.

The biometric information collator 30 collates the first transmission with the second transmission, and requests registration again if the recognizability is insufficient. When the recognizability is confirmed, the feature extracting means 3
5 extracts the feature, gives the feature to the feature registration unit 37, and causes the feature storage unit 36 to register and store the user. That is, in this method, if the identification code is stored, the user can be registered from a position away from the vehicle.

The method shown in FIG.
An operation means for user registration is provided, and registration is performed from the fingerprint sensor 21 of the biometric information reader 20 while operating this operation means. The registration method is the same as the case of performing the registration using the above identification code except for the operation of the operation means, for example, the switch, so that the description is omitted, but the registration while operating the biometric information collator 30 mounted on the vehicle is omitted. And is highly reliable. Further, when registering a plurality of users or when changing the users, the registration is performed as follows.

First, a user who has already registered performs a normal operation to bring the biological information reader 20 and the biological information collator 30 into a communication state. At this time, as described above, the encrypted information is transmitted from the biometric information collator 30 to the biometric information reader 20, and the fingerprint information based on the encrypted information is transmitted from the biometric information reader 20 to the biometric information collator 30. Is recognized as a user.
In this state, a new user re-enters the fingerprint sensor 2.
The fingerprint is transmitted by pressing 1, and the feature extracting unit 35 extracts the feature.
And stored in the feature storage means 36. The confirmation of the recognizability at this time is the same as the registration operation described above.

Although the configuration and operation of the biometric information collating security device according to the first embodiment of the present invention and the method of user registration have been described above, the method of user registration is not limited to these examples, and various methods can be used. The method can be selected.
In addition, the operation of the vehicle by operating the security device can include various operations such as opening / closing a door, starting an engine, and opening / closing a trunk. Further, the biometric information can use not only a fingerprint but also a palm shape, an iris, and a retina. Therefore, an image sensor such as a camera can be used as the sensor. The biological information reader 20 and the biological information collator 3
0 can correspond not only one-to-one but also a plurality of biometric information readers 20 and a plurality of biometric information collators 30 such as when a plurality of users use a plurality of vehicles. is there.

Embodiment 2 FIG. FIG. 6 shows a conceptual diagram of the use state of the biometric information collating security device according to the second embodiment of the present invention. In this embodiment, the biometric information reader 20 described in the first embodiment is carried. Phone 4
4 to improve the portability, and the biological information reader 20 incorporated in the mobile phone 44 has the same function as that of the first embodiment.
The target to be incorporated is not limited to the mobile phone 44, but may be a simple mobile phone, so-called PHS. In this case, a communication mode in a transceiver mode can be used. In the case of the transceiver mode, the communication distance is large. Therefore, since the operation can be performed even on a vehicle that is parked at a remote position, the operation can include a vehicle monitoring function.

[0028]

As described above, in the biometric information collating security device according to the present invention, according to the first aspect of the present invention, a biometric information reader having biometric information acquisition means and encryption means, Feature storage means for storing the obtained biometric information, encryption information holding means for holding the encrypted information and the decrypted information, and decryption means for decrypting the biometric information received from the biometric information reader, and decryption Feature extraction means for extracting features of the extracted biological information,
And a biometric information collator having a feature matching means for comparing the biometric information held by the feature storage means with the biometric information extracted by the feature extracting means, for communication between the biometric information reader and the biometric information collator. Since encryption is used, operations such as unlocking can be performed with a simple operation just by pressing the fingerprint sensor.Also, even if communication is intercepted, the information is encrypted and analyzed and decoded. It is difficult to do so, and high security can be maintained.

According to the second aspect of the present invention, the encrypted information held in the encrypted information holding means of the biometric information collator is
The information is read out by the operation of the biometric information reader and transmitted to the biometric information reader, and the encrypting means of the biometric information reader encrypts the biometric information based on the received encrypted information and transmits it to the biometric information collator. As a result, the biometric information reader does not hold the cryptographic information, and even if the biometric information reader is lost or stolen, the cipher cannot be decrypted and high security can be obtained.

Further, according to the third aspect of the present invention, the encryption information holding means has a random number generation means and holds a plurality of pieces of encryption information, and different encryption information corresponding to the random numbers generated by the random number generation means. Since the encrypted information is read, a different encryption is used every time the operation is performed, so that it is impossible to decipher the signal by intercepting the signal, thereby providing higher security.

Further, according to the invention of claim 4, since the public key is used for the encrypted information, it cannot be decrypted by a device other than the biometric information collator having the secret key, and the security is improved. Can be further enhanced. Further, according to the invention of claim 5, an integrated logic element including an algorithm in which a cryptographic information holding unit, a decryption unit, a feature extraction unit, a feature storage unit, and a feature comparison unit provided in a biometric information collator are provided. Since the biometric information after decryption cannot be read from the biometric information collator, high reliability is maintained.

Further, according to the invention of claim 6, since the biometric information can be transmitted from a plurality of biometric information readers to a plurality of biometric information matching devices using a public key, a plurality of biometric information readers can be transmitted. Even if you own a vehicle, you can operate multiple vehicles with a common biometric information reader, and because communication is a public key, you can decrypt it unless you have a biometric information collator that has a private key. And can provide high security.

According to the seventh aspect of the present invention, the biometric information reader is incorporated in a mobile phone or a PHS. According to the eighth aspect of the present invention, a verification type security device can be obtained, and the biometric information verification device is mounted on a vehicle, and the vehicle is operated based on the verification result of the biometric information from the biometric information reader. Therefore, a keyless entry system with extremely high security can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a biometric information matching security device according to a first embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a use state of the biometric information matching security device according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a flow of an operation of the biometric information matching security device according to the first embodiment of the present invention;

FIG. 4 is an explanatory diagram illustrating an operation flow of the biometric information matching security device according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating a flow of an operation of the biometric information matching security device according to the first embodiment of the present invention.

FIG. 6 is a conceptual diagram showing a use state of a biometric information matching security device according to a second embodiment of the present invention.

FIG. 7 is a conceptual diagram showing a usage state of a conventional biometric information collating security device.

FIG. 8 is a block diagram showing a configuration of a conventional biometric information collating security device.

[Explanation of symbols]

Reference Signs List 20 biometric information reader, 21 image sensor (fingerprint sensor), 22 biometric information acquisition means, 23 encryption means,
24, 34 encryption information holding means, 25, 32 communication means, 26, 31 antenna, 27 display means, 28, 4
2 operation control means, 30 biometric information collator, 33 decryption means, 35 feature extraction means, 36 feature storage means,
37 feature registration means, 38 feature matching means, 39 comprehensive judgment means, 41 unlocking / locking control means, 43 logic elements, 44 mobile phone.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B60R 25/10 619 E05B 49/00 K E05B 49/00 S G06F 15/00 330F G06F 15/00 330 H04L 9 / 00 673D H04L 9/14 641 (72) Inventor Kenji Shima 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 2E250 AA21 BB08 BB59 BB65 CC11 CC12 CC21 DD09 EE02 EE10 FF22 FF27 FF36 GG08 GG15 HH01 JJ03 KK03 LL01 LL14 TT03 5B085 AE25 AE29 5J104 AA07 AA16 AA32 EA04 KA16 NA02 NA20 NA37 PA16

Claims (8)

[Claims] Claims: 1. There is provided a biological information acquisition unit and an encryption unit,
A biometric information reader that encrypts and transmits the acquired biometric information, a cryptographic information holding unit that holds decryption information for decrypting the code, and the biometric information received from the biometric information reader by using the decryption information. Decryption means for decryption, feature extraction means for extracting features from the decrypted biometric information, feature storage means for holding features of biometric information registered in advance, features of biometric information held by the feature storage means, and feature extraction A biometric information matching device having feature matching means for matching features of the biometric information extracted by the means. 2. The apparatus according to claim 1, wherein said encrypted information is held in said encrypted information holding means, and said biometric information collator is operated by operating said biometric information reader. Transmitted to an information reader, wherein the encryption means of the biometric information reader is configured to encrypt the biometric information based on the received encrypted information, and transmit the biometric information to the biometric information collator. The biometric information matching security device according to claim 1. 3. The encryption information holding means includes a random number generation means, and holds a plurality of the encryption information.
3. The biometric information collating security device according to claim 2, wherein the encrypted information different from each other is read in accordance with the random number generated by the random number generating unit. 4. The biometric information collating security device according to claim 2, wherein a public key is used for the encrypted information. 5. An integrated logic element wherein said cryptographic information holding means, said decryption means, said feature extraction means, said feature storage means and said feature comparison means provided in said biometric information collator include an algorithm. The biometric information collating security device according to claim 1, wherein the security device is configured as: 6. The system according to claim 1, wherein said plurality of biometric information readers can transmit said biometric information to said plurality of biometric information matching devices using a public key. Item 6. A biometric information collating security device according to Item 5. 7. The biometric information reader is incorporated in a mobile phone or a PHS.
The biometric information collating security device according to claim 6. 8. The biometric information matching device is mounted on a vehicle,
The biometric information collating security device according to claim 1, wherein the vehicle is operated based on the biometric information collating result.