WO2003003773A1

WO2003003773A1 - Brake drum and method for producing the same

Info

Publication number: WO2003003773A1
Application number: PCT/JP2001/004512
Authority: WO
Inventors: Yoshiharu Maeda; Kuniharu Takayama; Hirohisa Naito
Original assignee: Fujitsu Limited
Priority date: 2001-05-29
Filing date: 2001-05-29
Publication date: 2003-01-09
Also published as: JPWO2003003773A1; JP3853316B2

Abstract

Brake drum is provided which is for use in drum brake apparatus of automotive vehicles (including motorcycles). The brake drum includes a ring-shaped drum body, and a friction member secured to the inner circumferential surface of the drum body. Because the drum body is formed of a lightweight A1 alloy and the friction member is formed of an A1-base composite material, the brake drum can be reduced in weight as a whole. Further, because the friction member, having projecting and depressed portions formed on its outer periphery, is cast-enveloped by molten metal of the A1 alloy, the friction member and the drum body can be firmly fastened together. Thus, even when a great braking force is applied to the drum brake, the friction member can be prevented from being undesirably detached from the drum body.

Description

Description Location information management system [Technical field]

The present invention relates to a position information management system that manages position information of a moving object, and that can use the position information while ensuring protection of privacy regarding the position information of the moving object.

[Background]

There is known a position information use system that provides various services using position information (for example, latitude and longitude) obtained by measuring the location of a moving object. Here, the moving object includes all movable objects such as people, animals, vehicles, and articles.

FIG. 17 is a diagram illustrating a configuration example of a position information use system. In Fig. 17, the location information utilization system uses a terminal (eg, a mobile phone terminal with a GPS function) that carries a mobile object to measure the location of the mobile object and transmits the position information. A location information service center that receives location information from mobile terminals and provides various services to the terminal using the location information (for example, a server that provides a web site on the Internet) And is configured.

Various services include, for example, (1) Napierge service, which guides mobiles such as people and cars to their destinations, and (2) Town information (locations of shops and restaurants) near the location of the mobiles. Area information providing service, (3) emergency notification service for notifying the location of mobiles in the event of an accident, (4) mobile location management service for managing the locations of mobiles such as the elderly, children, and staff, ( 5) A tracking service that tracks and monitors the location of items to be delivered.

However, the conventional location information management system has the following problems. That is, the location information transmitted from the mobile terminal is sent to the location information service sensor in a readable format, so that the location information service center can freely use the location information of the mobile body. Even if the location information is encrypted to prevent eavesdropping and compression during communication between the terminal and the location information service center, Such encryption is not performed for the location information service center because the service center can decrypt it.

Therefore, for example, when the moving object is a person, the location of the person becomes evident in the location information center, which is a problem from the viewpoint of privacy.

[Disclosure of the Invention]

Therefore, an object of the present invention is to provide a location information management system that can protect privacy regarding the location of a moving object.

In order to achieve the above object, a position information management system according to the present invention is a position information management system that manages position information of at least one moving object, wherein the position of the moving object is measured, and the measured position information is determined. And a position recording device that receives the position information and records the position information in an encrypted state.

In this way, the position information measured by the mobile terminal is encrypted by the encryption means unique to the mobile and transmitted to the position recording center, and the position recording device encrypts the position information of each mobile. It accumulates in the state of being transformed. The location information service center that provides the mobile or the predetermined location information service to the mobile cannot violate the privacy of the mobile because the location information of the other person recorded in the location recording device cannot be decrypted without the permission of the individual. Without this, it is possible to manage the position information of the moving object. In addition, the position recording device itself cannot decrypt the stored position information unless an encryption key is obtained from the moving object, so that high security can be ensured.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a position information management system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of encryption of position information.

FIG. 3 is a flowchart of a transmitting operation of the position information in the terminal 10.

FIG. 4 is a schematic processing flowchart of the position recording center 20.

FIG. 5 is a schematic diagram of use mode 1 of the position management system according to the present embodiment. FIG. 6 is a processing flowchart of usage mode 1.

FIG. 7 is a schematic diagram of a use mode 2 of the position management system according to the present embodiment. FIG. 8 is a processing flowchart of usage mode 2.

FIG. 9 is a schematic diagram of a usage mode 3 of the position management system according to the present embodiment. FIG. 10 is a processing flowchart of usage mode 3.

FIG. 11 is a schematic diagram of use form 4 of the position management system according to the present embodiment.

FIG. 12 is a processing flowchart of usage mode 4.

FIG. 13 is a schematic diagram of a use mode 5 of the position management system according to the present embodiment.

FIG. 14 is a processing flowchart of usage mode 5.

FIG. 15 is a schematic diagram of a usage mode 6 of the position management system according to the present embodiment.

FIG. 16 is a processing flowchart of usage mode 6.

FIG. 17 is a diagram illustrating a configuration example of a position information use system.

[Best Mode for Carrying Out the Invention]

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited by such an embodiment.

FIG. 1 is a diagram showing a configuration example of a position information management system according to an embodiment of the present invention. In FIG. 1, the location information management system according to the present embodiment is a terminal carried by a mobile body, which has a function of measuring the location of the mobile body and transmitting the location information (for example, a mobile phone with a GPS function). Telephone terminal) 10 and a position recording sensor (position recording device) 20 for receiving and storing the position information, and a position information service center 30 is provided according to the usage form. Is also good.

The terminal 10 has a positioning unit 101, a clock unit 102, an encryption unit 103, a decryption unit 104, an input unit 105, an output unit 106, an authentication unit 107, and transmission / reception. Unit 108, Control unit 109 And The positioning unit 101 measures the current position of the terminal 10. The timing to be measured is controlled by the control unit 109 based on settings and instructions input from the clock unit 102 and the input unit 105.

To measure the current position, for example, (1) GPS (Global Positioning System) using radio waves from artificial satellites and positioning methods using radio waves from multiple locations, (2) direction sensors and speed sensors such as gyros (3) Hybrid method combining (1) and (2), and (4) A device that has the function of specifying the position in advance at the location to be measured (Patent Publication No. 63-010300) (5) There is a method using the location of a base station such as a PHS (Personal Handy Phone System) or a mobile phone.

The position coordinates of the current position obtained by the positioning unit 101 can be expressed in the following format.

• Latitude 'longitude Example) (Ν35.123 · 456, E130.123.456)

• Displacement from the specified reference point (latitude / longitude)

Example) Assuming that the reference point is (Ν35.123 · 456, E130.123.456), the displacement (+0.234.567,

-0.123.456) _Ν or (azimuth 130 degrees, distance χχχ meters)

The clock unit 102 measures and accumulates time, and outputs the measurement time at which the current position was measured by the positioning unit 101. It is also used for timing control of the positioning unit 101 and the transmission / reception unit 108.

The encryption unit 103 encrypts position information including the position coordinates of the current position measured by the positioning unit 101. The position information preferably includes a measurement time corresponding to each position coordinate. For example, there are the following methods for encrypting location information.

• Only the position coordinates are encrypted without encrypting the measurement time

• Encrypted set of position coordinates and measurement time

· Encrypt multiple location information (set of location coordinates and measurement time)

FIG. 2 is a diagram illustrating an example of encryption of position information. The encryption unit 103 encrypts the position information using public key encryption or secret key encryption. Public key cryptography is a method of encrypting and decrypting data using two pairs of keys, and is also called asymmetric cryptography. Secret key cryptography is an encryption method that uses the same key for encryption and decryption. It is also called "shared key cryptography" or "common key cryptography" because the same key must be shared between the recipient and the recipient.

In the encryption unit 103, in addition to always using the same encryption method, for example, the encryption method may be specified and changed as follows.

· Change the encryption method used depending on the time. For example, from 8:00 a.m. to 5:00 p.m., use encryption method A, and at other times, use encryption method B

• Change the encryption method used depending on the location. For example, if you are in one area, use encryption method A, and in other areas, use encryption method B.

• Change the encryption method depending on the time and place. For example, if you are in one area at one time, encrypt using encryption method A, and if you are in another area at one time, encrypt using encryption method B

• Change the encryption method according to the user's specification. For example, change from encryption method A to encryption method B as specified by the user

Here, the change of the encryption method is as follows.

• Change only the encryption key without changing the public key number or the type of secret key encryption

• Change the type of public key encryption and private key encryption

In this way, by changing the encryption method according to time, place, or user designation, in each usage mode of the location information management system according to the present embodiment described later, the user can obtain the location information even if the user knows the location information. You will be able to specify good times and places.

The decryption unit 104 decrypts the position information encrypted by the encryption unit 103 and returns the position information to a readable format. The input unit 105 is a unit for the user to perform various settings and inputs to the terminal 10. Examples of the settings and inputs include the following.

• Measurement timing setting

• Set the location information transmission timing

-Set sending / non-sending of location information

• Location information service selection settings • Set the encryption method to be used.

• Transmission command input

• Enter permission to send the encryption key.

The output unit 106 outputs various information from the terminal 10. The information to be output includes the following, for example.

• Measured location information

• Information received from location recording center 20

• Information received from location services

• Terminal 10 settings

The transmission / reception unit 107 transmits / receives various information between the terminal 10 and the location recording center 20 or between the terminal 10 and the location information center 30. Use networks such as the Internet and public telephone networks. The transmission timing is controlled by the control unit 109.

The personal authentication unit 108 performs personal authentication of the user carrying the terminal 10. For example, there are the following methods for personal authentication.

• How to use user ID and password

• Biometric methods such as fingerprints and irises

The identity authentication unit 108 can prevent others from using the terminal 10 to falsify the location information. Only when the personal authentication is successful, it is possible to encrypt the location information and transmit the encrypted location information. The request timing of the personal authentication is controlled by the control unit 109.

The control unit 109 includes a positioning unit 101, a clock unit 102, an encryption unit 103, a decryption unit 104, an input unit 105, an output unit 106, an identity authentication unit 107, Controls the transmission and reception unit 108. A control example of the control unit 109 is as follows.

· Positioning timing control

• Encryption timing control

• Enable / disable location transmission and control timing

• Control of the encryption method used

The memory 110 stores various data. The information to be stored is, for example, You.

Position information measured by the positioning unit 101

The encryption key of the encryption unit 103

Setting data for control of control unit 109

Input unit 105, output unit 106, buffer data in transmitting / receiving unit 107 Data for personal authentication in personal authentication unit 108

FIG. 3 is a flowchart of a transmitting operation of the position information in the terminal 10. In FIG. 3, when a user inputs predetermined personal authentication information (for example, a user ID and a password) from the input unit 105, the personal authentication unit 108 performs personal authentication. When the personal authentication is successful (S30), the positioning unit 101 measures the current position at a predetermined timing (S31). The encryption unit 103 encrypts the position information (including at least the measured position coordinates, and preferably further including the measurement time) (S32). When transmitting the encrypted position information (S33), the transmission / reception unit 107 transmits the encrypted position information (S34).

In FIG. 1, the position recording center 20 is composed of an encrypted position information database 201, a registration unit 202, an acquisition unit 203, a transmission / reception unit 204, a temporary memory 205, and a decryption unit 206. , An erasing unit 2007 and a position information processing unit 208.

The encrypted position information data base 201 stores / records the encrypted position information received from the terminal 10 for each user in an encrypted state. Further, the following information may be stored in the encrypted position information database 201.

• User information such as user attributes, preferences, and history

• If permitted, the processing result of the position information processing unit 208

As described above, since the location information stored in the encrypted location information database 201 is encrypted, the location record center 20 itself also needs to obtain an encryption key from the mobile unit (user) unless the encryption key is obtained from the mobile unit (user). The encrypted location information cannot be decrypted. Therefore, it is possible to accumulate and record the position information of the moving object without infringing the privacy of the moving object.As described later, the accumulated position information is protected while protecting the privacy of the moving object. It is possible to provide various services using.

The registration unit 202 registers the encrypted position information received from the terminal 10 in the encrypted position information database 201. The acquiring unit 203 acquires (reads) encrypted position information from the encrypted position information database 201 in response to an encrypted position information acquisition request from the terminal 10 or the position information service center 30. At this time, the acquiring unit 203 determines whether the request source is the terminal 10 or the location information service center 30 permitted by the user who is the target of the encrypted location information, and Acquires encrypted location information only when The determination is made based on, for example, the ID of the terminal 10 or the location information service 30 included in the request.

The transmission / reception unit 204 transmits / receives various information between the location recording center 20 and the terminal 10 or between the location recording center 20 and the location information service center 30. You can use networks such as Inn Yuichi Net and the public telephone network.

The temporary memory 205 temporarily stores various information. The information stored in the temporary memory 205 cannot be read except for the specified use. Information stored in the temporary memory 205 is, for example, as follows.

• Encrypted location information obtained from the encrypted location information data base 201 by the acquisition unit 203

• Encryption key received from terminal 10

• The position information decoded by the decoding unit 206

· Result of information processing performed by position information processing unit 207 based on decrypted position information

The erasure unit 2007 erases the information stored in the temporary memory 205, and the decrypted location information and encryption key do not remain in the location record sensor 20 and / or are reused for another purpose. Not to be.

The position information processing unit 208 performs various processes based on the encrypted position information or the decrypted position information. The processing performed by the position information processing unit 208 is, for example, as follows.

• Processing to send the encrypted location information obtained from the encrypted location information database 201 to another designated terminal or designated location information service center. • Decrypt the location information obtained from the encrypted location information database 201 with the permission of the user, and decrypt the decrypted location information to another designated terminal or designated location information service center. Processing to send to

• The encrypted location information obtained from the encrypted location information database 201 is decrypted with the permission of the user, and the decrypted location information is sent to the designated location information service center to send the location information service center. Process of acquiring information service from and sending the acquisition result to the terminal

• Processing to edit the information obtained from multiple location information services and send it to the information terminal

· Decrypts the encrypted location information obtained from the encrypted location information data base with the permission of the user, performs processing on the decrypted location information, and sends the processing result to the user or a designated terminal Processing

• In response to an external inquiry regarding the owner of the location record, the encrypted location information obtained from the encrypted location information database 201 was decrypted with the permission of the subject of the inquiry, and decrypted. Process that performs processing on location information, generates and issues answers to inquiries

• If multiple users are allowed to decrypt the encrypted location information, process the location information of multiple users and send the processing result to the user or the specified terminal

FIG. 4 is a schematic processing flowchart of the position recording center 20. At position recording center 20, upon receiving the character information from terminal 10 (S 40), registration unit 202 registers the encrypted position information in encrypted position information database 201. Yes (S41). Further, upon receiving a processing request for the encrypted location information from the terminal 10 or the location information service center 30 (S42), the acquisition unit 203 determines whether or not the processing is permitted (S43). If the permission is granted, the acquisition unit 203 acquires the requested encrypted position information from the encrypted position information database 201 (S44). If the obtained encrypted position information is directly transmitted to the request source (terminal 10 or the position information service center 30) (S45), the obtained encrypted position information is returned (S46). Otherwise (when performing predetermined processing on the encrypted position information), the decryption unit 206 acquires The decrypted encrypted location information is decrypted (S47), the location information processing unit 208 executes a predetermined process on the decrypted location information (S48), and the processing result is Sent to the requester (S49). <Usage form>

Hereinafter, a usage form of the position information system according to the embodiment of the present invention will be described. (Usage form 1)

The usage mode 1 is a case where a user who is a mobile object extracts his / her own position information / past trajectory from the position recording center 20 and uses it. FIG. 5 and FIG. 6 are charts showing the process. In usage mode 1, the user himself uses his own location information. Specific examples of use are as follows.

• Check the position / trajectory you have moved in your diary / travel / climbing.

• Find out where you were at a specified date and time.

Referring to FIG. 5, a description will be given of FIG. 6. First, a request for acquiring the encrypted position information of the user at a predetermined time or a predetermined period is transmitted from the terminal 10 to the position recording center 20 (S 6 0). If the user himself / herself requests location information, the location recording center 20 permits the processing request, and upon receiving the request, sends the user ID included in the request for the specified time or period. The corresponding encrypted location information is obtained from the encrypted location information database 201, and is returned to the source terminal 10 (S61). The terminal 10 decrypts the received encrypted position information (S62), and the user uses the position information (S63).

As described above, since the position record history stores the history of the position information for each moving object, each moving object can acquire its own past position. Since the location information is stored and transmitted in an encrypted state, the privacy of the mobile unit can be protected.

(Usage form 2)

In usage pattern 2, User B different from User A uses the location information of User A. In other words, using the location recording center 20, the group / community Sharing location / track information within a tee (between multiple users). FIG. 7 is a schematic diagram of the usage mode 2, and FIG. 8 is a processing flowchart thereof. A feature of the usage form 2 is that the user A transmits the encryption key to the terminal 10B of the user B, and the user B decrypts the encrypted position information of the user A.

The specific usage example is as follows.

• Display each other's location on the terminal between friends

• Management of personnel positions in the company

Referring to FIG. 8, referring to FIG. 7, first, transmitting the encrypted location information of user A from terminal 1 OA of user A to terminal 10 B of user B to location recording center 20. The transmission permission information to be permitted is transmitted (S80). The position recording center 20 stores the transmission permission information in a predetermined storage device. The transmission permission information includes a predetermined transmission permission condition such as a period during which transmission is permitted. Further, the encryption key (the encryption key stored in the terminal 1 OA) for decrypting the encrypted position information of the user A is transmitted from the terminal 10 A of the user A to the terminal 10 B of the user B (S 81 ). The terminal B of the user B transmits a request for obtaining the encrypted position information of the user A at a predetermined time or a predetermined period (S82). Upon receiving the processing request, the location recording center 20 determines the transmission permission based on the transmission permission information from the user A, and in the case of the transmission permission, the encrypted location information of the user A from the encrypted location information database 201. The information is acquired and transmitted to terminal B of user B (S83). Upon receiving the encrypted location information, the terminal 10B decrypts the encrypted location information using the encryption key from the terminal 1 OA (S84), and the user B uses the decrypted location information (S85). When the terminal 10B further requests the encrypted position information of the user A (S86), the process returns to step S82.

Thus, the location recording center 20 does not transmit the location information of the user A to another user B without the permission of the user A. Also, since the location information is encrypted, user B cannot decrypt the location information of user A without obtaining an encryption key from user A, so that an unauthorized user can know the location information. Instead, location information can be shared among multiple users. (Usage form 3)

The usage mode 3 is a case where the user uses the location information service center 30. FIG. 9 is a schematic diagram of Usage Mode 3, and FIG. 10 is a flowchart of the process. A feature of the usage mode 3 is that the user passes the encryption key to the location information service center 30 and decrypts the encrypted location information at the location information service center 30.

A specific usage example of usage mode 3 is as follows.

• Receive location information services (eg, town information using current location information) from Location Information Service Center 30

• Emergency notification service

Referring to FIG. 9, FIG. 10 will be described. First, a predetermined location information service request is transmitted from the user terminal 10 to the location information service center 30 (S100). At this time, the encryption key of the user terminal 10 is transmitted together with the location information service request. Further, transmission permission information for permitting transmission of the user's encrypted location information to the location information service center is transmitted from the user terminal 10 to the location recording center 20 (S101). ). The position recording center 20 stores the transmission permission information in a predetermined storage device. The transmission permission information includes a predetermined transmission permission condition such as a period during which transmission is permitted. The location information service center 30 transmits a request to acquire the encrypted location information of the user at a predetermined time (including the present time) or for a predetermined period (S102). Upon receiving the request, the location recording center 20 confirms the above-mentioned transmission permission information from the user, and then acquires the user's encrypted location information from the encrypted location information database 201. And sends it to the location information service center 30 (S103). Upon receiving the encrypted location information, the location information service center 30 decrypts the encrypted location information using the encryption key from the terminal 10 and performs a predetermined service process (S104). For example, the location information service center 30 obtains the current location of the user and executes a process of searching for nearby shop information. The location information service center 30 transmits the processing result to the terminal 10 (S105). When the location information service center 30 further requests the user's encrypted location information (S106), the process returns to step S102.

As described above, the position recording center 20 stores the position information permitted by the user (mobile body). Since the location information service center 30 transmits the location information service center 30, the user can receive the service of the location information service center 30 without knowing the user's location information indefinitely. Can be. (Usage form 4)

In usage mode 4, the user terminal 10 receives the result of the information processing based on its own location information from the location recording center 20. The user sends the encryption key to the location recording center 20, the decryption unit 206 of the location recording center 20 decrypts the encrypted location information, and the location information processing unit 208 of the location recording center 20. Then, processing is performed using the decrypted position information, and the processing result is sent to the terminal 10. FIG. 11 is a schematic diagram of Usage Mode 4, and FIG. 12 is a flowchart of the process.

The position information processing unit 208 of the position recording center 20 performs statistical processing of the position information / trajectory information recorded in the encrypted position information database 201.

Specific processing contents / examples of use are as follows.

· Calculate the number of visits and frequency of visits for each location based on the current location information • Calculate the time required for the specified course

• Calculate the date, time, and time you were at a specified location

FIG. 12 will be described with reference to FIG. 11. First, a predetermined position information processing request is transmitted from the user terminal 10 to the position recording center 20 (S120). At this time, the encryption key of the user terminal 10 is transmitted together with the position information processing request. The position recording sensor 20 stores the received encryption key in its temporary memory 205 (S121). The acquisition unit 203 of the position recording sensor 20 acquires the encrypted position information of the user specified in the processing request, and the decryption unit 206 is stored in the temporary memory 205. The encrypted position information is decrypted using the encryption key, and the decrypted position information is stored in the temporary memory 205 (S122). The position information processing section 208 of the position recording center 20 reads out the decoded position information from the temporary memory 205, performs a predetermined process (S123), and stores the temporary memory 205. After that, the processing result is transmitted to the terminal 10 (S124). After transmission of the processing result, the position record erasure unit 207 of the location sensor 20 7 uses the encryption key stored in the temporary memory 205 and decryption. The data of the converted location information and the processing result are deleted (S125).

As described above, the position recording center 20 decrypts the encrypted position information, executes a predetermined process, and transmits the processing result to the user terminal 10 so that the terminal 10 can obtain the position information. There is no need to have a processing function, and the configuration of the terminal 10 can be simplified.

In addition, even when the encrypted location information is decrypted in the location recording center 20, the location recording center 20 processes the encryption key received from the mobile unit, the decrypted location information, and the processing result. Since the data is later erased, there is no possibility that the privacy of the mobile unit (user) is violated in the position recording center 20. In the following usage modes 5 and 6, the location recording center 20 decrypts the encrypted location information. Similarly, by deleting information on the privacy of the mobile unit (user), the mobile unit ( User's privacy.

(Usage form 5)

In usage mode 5, when the user uses the location information service, the location recording center 20 is used as an intermediary. The difference from the usage mode 3 is that the encryption key is sent to the position recording center 20 and the position recording center 20 decrypts the encrypted position information. FIG. 13 is a schematic diagram of Usage Mode 5, and FIG. 14 is a processing flowchart thereof. The user may directly specify the location information service center 30 he / she wants to use, or only the location information service he / she wants to obtain without specifying the location information service center. Vissen evening may be selected.

The location recording center 20 can send the usage result of the location information service center 30 to the user's information terminal in the same format, or can send the edited result of the usage result.

Specific usage examples of usage mode 5 are as follows.

• I want to know the town information near the current location.

• I want to know sightseeing courses near my current location.

FIG. 14 will be described with reference to FIG. 13. First, a predetermined location information for the location information service center 30 is transmitted from the user terminal 10 to the location record center 20. An information service request is transmitted (S140). At this time, the encryption key of the user terminal 10 is transmitted together with the location information service request. The position recording center 20 stores the received encryption key in its temporary memory 205 (S141). The acquisition unit 203 of the location recording unit 200 acquires the encrypted location information of the user specified in the service request, and the decryption unit 206 acquires the encryption key stored in the temporary memory 205. Then, the encrypted position information is decrypted, and the decrypted position information is stored in the temporary memory 205 (S142). The position information processing unit 208 of the position recording center 20 reads out the decoded position information from the temporary memory 205 and sends the decoded position information and the above-mentioned position information service request to the position information service center. It is transmitted in the evening of 30 (S144). The location information service center 30 performs the service processing of the received location information, and returns the processing result to the location record center 20. The position recording sensor 20 stores the processing result in the temporary memory 205, and then transmits the processing result to the terminal 10 (S144). After transmitting the processing result, the erasing unit 207 of the position recording sensor 200 deletes the encryption key, the decrypted position information, and the processing result data stored in the temporary memory 205 (S 1 4 5).

As described above, since the location recording center 20 decrypts the encrypted location information and uses the location information service center 30 instead of the user, the mobile unit (user) name is transmitted to the location information service center 30. You can use the location information service 30 without revealing it.

If a mobile unit (user) wants to use a plurality of location information service centers 30, the location record center 20 acts as a proxy to access the plurality of location information service centers 30, The user can use a plurality of location information services simply by accessing the location recording center 20—location. (Usage form 6)

In usage mode 6, the location recording center 20 generates an answer based on the location information recorded by the location recording center 20 in response to an inquiry request from a third party regarding the location of a certain mobile unit (user). Respond to a third party. Since the location recording center 20 records the encrypted location information in a non-rewritable manner, it guarantees the location of the mobile unit (user). Functions as a certificate authority. The response to the third party may take the form, for example, of a guarantee or certificate. Fig. 15 is a schematic diagram of usage mode 6, and Fig. 16 is its processing flowchart.

Specific examples of inquiry requests and answers from third parties are as follows. Requests for inquiries from third parties are made at the time of contracts for sales, loans, employment, etc. For example, if a user enters into a sales contract or loan agreement with a third party, if the third party confirms the address of the user, if the user enters into a employment contract with a third party, For example, when confirming the educational and occupational histories of students.

Contact:

a) I want to know the current location of the mobile (user).

b) I want to know if the mobile is / was at the location inquired.

c) I want to know where the mobile was at the date and time inquired.

d) I want to know the date and time when the user was at the specified location.

e) I want to know if the mobile was at the inquiry location on the inquiry date and time.

たい I want to know if the address and workplace declared by the user are accurate.

g) I want to know if the user's resume is accurate.

Answer:

a) Answer the current position of the target mobile unit.

b) yes / no

c) Answer where you were at the inquiry time.

d) Answer the date and time you were at the inquiry location.

e) yes / no

ΰ For example, if the target mobile (user) frequently goes to the location of the address in the middle of the night, the address can be determined to be accurate. Also, if you frequently go to your place of work in the daytime, you can determine that your place of work is accurate.

g) For example, if you were to go to school, and you frequently went to the school location, you can determine that you were at school.

FIG. 16 will be described with reference to FIG. The third party sends a location inquiry request for the user from its own terminal 10 C to the location recording center 20 (S 160). When the location recording center 20 receives the location inquiry request, the location recording center 20 notifies the user terminal 10A that a location inquiry request has been received from a third party, and the user terminal 10 receives the notification. If the response to the request is permitted, the encryption key is transmitted to the position recording center 20. The position recording sensor 20 stores the received encryption key in the temporary memory 205 (S1661).

The decryption unit 206 of the position recording center 20 decrypts the encrypted position information corresponding to the position inquiry request using the code key stored in the temporary memory 205, and Is stored in (S162). The position information processing unit 208 generates a response to the position inquiry request based on the decrypted position information (S163), and notifies the third terminal 10C of the response (S16). 1 6 4). The answer may be notified, for example, as a certificate by the location record center 20. After the response is notified, the erasure unit 207 of the position recording center 20 erases the encryption key, the decrypted position information, and the data of the answer stored in the temporary memory 205 (S 1 6 5).

As described above, since the encrypted position information stored in the position recording center 20 cannot be falsified, the position recording center 20 can provide a guarantee function using the position information.

The protection scope of the present invention is not limited to the above embodiments, but extends to the inventions described in the claims and their equivalents. [Possibility of industrial use]

As described above, according to the present invention, the location information measured by the mobile terminal is encrypted and transmitted to the location recording center, and the location recording center encrypts the location information of each mobile body. It accumulates in the state of being transformed. The location information service center that provides the mobile unit or the predetermined location information service to the mobile unit cannot infringe on the privacy of the mobile unit because the location information of the other person recorded in the location recording device cannot be decrypted without the permission of the individual. It is possible to manage the position information of the moving object without having to do so. Also, the position recording device itself cannot decrypt the stored position information unless the encryption key is obtained from the moving object, so that high security can be ensured.

Claims

The scope of the claims

1. In a location information management system that manages location information of mobile

A terminal for measuring the position of the moving object, encrypting the measured position information by a predetermined encryption means and transmitting the encrypted information;

A position information management system, comprising: a position recording device that receives the position information and records the position information in an encrypted state.

2. In Claim 1,

The position recording device transmits the encrypted position information of the moving object corresponding to the terminal to the terminal based on a request from the terminal,

The location information management system, wherein the terminal decrypts the encrypted location information using decryption data held by the terminal.

3. In Claim 1,

The position recording device, when receiving predetermined permission information from the first terminal, based on a request from the second terminal, an encrypted position of the mobile object corresponding to the first terminal. Transmitting information to the second terminal,

The position information management system, wherein the second terminal is capable of decrypting the encrypted position information when receiving the decryption data held by the second terminal from the first terminal.

4. In Claim 1,

When receiving the predetermined permission information from the terminal, the location recording device, based on a request from a location information service center that provides the terminal with a predetermined service, moves the mobile station corresponding to the terminal. Transmitting the encrypted location information of the body to the location information service center,

The location information service center, when receiving the decryption data held by the terminal from the terminal, decrypts the encrypted location information, and A position information management system, wherein a predetermined process is performed on location information, and a result of the process is transmitted to the terminal. In claim 1,

When receiving the decryption data held by the terminal from the terminal, the position recording device, based on a request from the terminal, encrypts the encrypted position information of the mobile unit corresponding to the terminal. A position information management system, wherein the position information is decoded using data, a predetermined process is performed on the decoded position information, and a processing result is transmitted to the terminal. In claim 1,

The position recording device, when receiving the decryption data held by the terminal from the terminal, based on a request from the terminal, encrypts the positional information of the mobile unit corresponding to the terminal, Decoding using the location information, transmitting the decoded location information to a location information service center that provides a predetermined service to the terminal,

The location information service center executes a predetermined process on the decrypted location information, transmits the processing result to the location recording device, and the location recording device sends the processing result to the terminal. A location information management system characterized by transmitting. In claim 1,

The position recording device, when receiving predetermined permission information from the terminal, based on a request from a third party, encrypts the mobile device corresponding to the terminal, and outputs the encrypted position information to the decryption data. A position information management system characterized in that the position information is decoded by using the method, a predetermined process is performed on the decoded position information, and the processing result is transmitted to the third party. In claim 7, The location information management system according to claim 1, wherein the predetermined process is a process of responding to an inquiry about a mobile object corresponding to the terminal. In claim 8,

The location information management system, wherein the location record center has a guarantee function for the answer.

10. In claims 8 or 9,

The inquiry includes the current position of the moving object, whether or not the user is at the specified position, whether or not the user is at or at the specified position at the specified date and time, the position at the specified date and time, A location information management system characterized by at least one of the date and time at which the user was in the designated place.

1 1. In Claim 1,

The terminal comprises a plurality of encryption means,

A position information management system characterized in that an encryption means for encrypting the position information can be switched based on the position and / or time of the terminal or an instruction from a moving object. 1 2. In Claim 1,

The terminal includes personal authentication means for a mobile object,

A position information management system characterized in that when the personal authentication is successful, the position of the moving object is measured, and the measured position information can be encrypted and transmitted by predetermined encryption means.

1 3. In Claim 1,

When the location recording device receives the decryption data from the terminal, and decrypts the encrypted location information using the decryption data,

The decoding data, the decoded position information, and the decoded position After storing the processing result of the predetermined processing executed on the information in the temporary memory, and transmitting the processing result to the terminal, the decoding data, the decoded position information and the processing result are stored in the temporary memory. A position information management system characterized by erasing from a location.

1 4. In Claim 13,

The position information management system, wherein the position recording device executes the predetermined processing. 1 5. In Claim 13,

The position recording device transmits the decrypted position information to a position information service center that provides a predetermined service using the position information, and a processing result of the predetermined processing executed by the position information service center Receiving from the location information service center.

1 6. A measuring section for measuring the position of the moving object,

An encryption unit that encrypts the measured position information by a predetermined encryption unit, and a communication unit that transmits the encrypted position information.

A decryption unit for decrypting the encrypted location information; receiving the location information from the communication unit; and decrypting the received location information using the decryption data. And a terminal.

17. A communication unit that receives encrypted location information regarding the location of at least one mobile from a terminal of the mobile,

A position recording device comprising: a data base for recording the position information in an encrypted state.

1 8. In Claim 17,

Acquire location information recorded in the database according to a predetermined request Equipped with an acquisition unit,

The position recording device, wherein the communication unit transmits the acquired position information in an encrypted state from the communication unit. In claim 17,

An acquisition unit that acquires position information recorded in the database according to a predetermined request;

Comprising a decryption unit for decrypting the obtained encrypted position information,

Upon receiving decryption data for decrypting the encrypted position information together with the request, the decryption unit decrypts the obtained encrypted position information and transmits the decrypted position information. Position recording device. In claim 17,

An acquisition unit that acquires position information recorded in the data pace according to a predetermined request;

A decryption unit for decrypting the obtained encrypted position information,

A processing unit that performs a predetermined process on the decryption position information; and receiving a decryption data for decrypting the encryption position information together with the request, the decryption unit acquires the acquired The position recording device, wherein the encrypted position information is decrypted, and the processing unit transmits a processing result of a predetermined process to the decrypted position information. In claim 20,

A temporary memory for storing the decryption data, the decrypted position information, and the processing result;

A position recording device, comprising: an erasing unit that erases the decoding data, the decoding position information, and the processing result from the temporary memory after transmitting the processing result.