WO2007061006A1

WO2007061006A1 - Information readout apparatus, authentication-information generating apparatus, information readout method, authentication-information generating method, information readout program, authentication-information generating program, and recording medium

Info

Publication number: WO2007061006A1
Application number: PCT/JP2006/323351
Authority: WO
Inventors: Tadayasu Kaneko; Koji Koga; Takeshi Sato; Goro Kobayashi
Original assignee: Pioneer Corporation
Priority date: 2005-11-24
Filing date: 2006-11-22
Publication date: 2007-05-31

Abstract

An information readout system (100) is provided with an information readout apparatus (110) and an authentication-information generating apparatus (120). An identification-information acquiring section (111) acquires medium-identification information individually assigned to a recording medium (101) on which predetermined information is recorded. An authentication-information acquiring section (112) acquires authentication information generated on bases of medium-identification information and apparatus-identification information individually assigned to itself. A readout section (113) reads out information recorded on the recording medium (101). A readout control section (114) controls the readout section (113) in accordance with the authentication information. A receiving section (121) receives the medium-identification information and the apparatus-identification information from the information readout section (110). A generating section (122) generates authentication information by using the medium-identification information and the apparatus-identification information. A transmitting section (123) transmits the authentication information generated to the information readout apparatus (110).

Description

Specification

Information reading device, authentication information generating device, information reading method, authentication information generating method, information reading program, authentication information generating program, and recording medium

Technical field

The present invention relates to an information reading device used when reading information used by a mobile object

The present invention relates to an authentication information generating device, an information reading method, an authentication information generating method, an information reading program, an authentication information generating program, and a recording medium. However, the use of the present invention is not limited to the above-described information reading device, authentication information generating device, information reading method, authentication information generating method, information reading program, authentication information generating program, and recording medium.

Background art

[0002] Conventionally, data used in in-vehicle devices such as navigation devices, such as map data and application data, can be updated by exchanging disks such as DVD-ROM, CD-ROM, etc. This is done by updating the data recorded on the (node disk) with updated data.

[0003] Such data update is, for example, whether the data type of the road data, the route search data, or the route guidance data is a deviation data type, or the background data type is updated! Let the user specify And when updating any of road data, route search data, route guidance data, update all data of the corresponding data type stored in the hard disk, and if it is the data type of background data, This is done by updating data in units of blocks that fall within the specified range (for example, see Patent Document 1 below).

[0004] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2005-148004

Disclosure of the invention

Problems to be solved by the invention

However, according to the above-described conventional technique, there is a possibility that the update disk may be lent out or copied by the user when updating is performed using the update disk in which the update data is recorded. Is given as an example. Lending update disk If illegal data updates are made by borrowing or copying, it is not possible to obtain revenue from sales of update disks or update data. For this reason, for example, there is a problem that it is difficult to provide the latest information, such as map data reflecting the road conditions that change every moment.

[0006] In addition, when setting a password or key for data recorded on an update disk, the problem is that the password must be recorded and distributed on another medium. . In addition, when the stored data is updated by sending the hard disk to the manufacturer, copying of the updated data can be prevented, but it takes time and effort to complete the update after requesting the update. One problem is the burden.

Means for solving the problem

In order to solve the above-described problems and achieve the object, an information reading apparatus according to the invention of claim 1 is an identification for acquiring medium identification information uniquely given to a recording medium on which predetermined information is recorded. An information acquisition means, authentication information acquisition means for acquiring authentication information generated based on the medium identification information acquired by the identification information acquisition means, and device identification information uniquely assigned to the own device; and A reading unit that reads the predetermined information recorded on the recording medium; and a reading control unit that controls the reading unit based on the authentication information acquired by the authentication information acquiring unit. To do.

[0008] Further, the authentication information generating apparatus according to the invention of claim 4 reads the medium identification information uniquely given to the recording medium on which the predetermined information is recorded, and the information recorded on the recording medium. Using the receiving means for receiving the device identification information inherently given to the information reading device to be taken from the information reading device, and the medium identification information and the device identification information received by the receiving means. Generating means for generating authentication information for reading the predetermined information recorded on the information processing apparatus, and transmitting means for transmitting the authentication information generated by the generating means to the information reading device. .

[0009] Further, the information reading method according to the invention of claim 5 includes an identification information acquisition step of acquiring medium identification information uniquely given to a recording medium on which predetermined information is recorded, and the identification information acquisition. Media identification information acquired by the process and device uniquely assigned to the device itself An authentication information acquisition step for acquiring authentication information generated based on the identification information, and reading the predetermined information recorded on the recording medium based on the authentication information acquired by the authentication information acquisition step And a reading process.

[0010] Further, the authentication information generating method according to the invention of claim 6 reads the medium identification information uniquely given to the recording medium on which the predetermined information is recorded, and the information recorded on the recording medium. The device identification information uniquely assigned to the information reading device to be read is received from the information reading device, and the medium identification information and device identification information received by the receiving step are used to record the recording information. A generating step for generating authentication information for reading the predetermined information recorded on the medium; and a transmitting step for transmitting the authentication information generated by the generating step to the information reading device. And

[0011] An information reading program according to the invention of claim 7 causes a computer to execute the information reading method according to claim 5.

[0012] Further, an authentication information generation program according to the invention of claim 8 causes a computer to execute the authentication information generation method of claim 6.

[0013] Further, a recording medium according to the invention of claim 9 is readable by a computer in which the information reading program according to claim 7 is recorded.

[0014] Further, a recording medium according to the invention of claim 10 is readable by a computer recording the authentication information generation program according to claim 8.

Brief Description of Drawings

[0015] FIG. 1 is a block diagram showing a functional configuration of an information reading system according to an embodiment.

FIG. 2 is a flowchart showing a procedure of information reading processing by the information reading device.

FIG. 3 is a flowchart showing a procedure of authentication information generation processing by the authentication information generation device.

FIG. 4 is a block diagram showing a hardware configuration of the navigation device.

[FIG. 5] FIG. 5 is a flowchart showing a procedure of map data update processing of the navigation device. o

[FIG. 6] FIG. 6 is a flowchart showing the procedure of the map data update process of the navigation device.

Yes

[FIG. 7] FIG. 7 is a flowchart showing a procedure of password generation processing by the management server.

Explanation of symbols

Information reading system

101 recording media

110 Information reader

111 Identification information acquisition unit

112 Authentication information acquisition unit

113 Scanning unit

114 Reading control unit

120 Authentication information generator

121 Receiver

122 generator

123 Transmitter

BEST MODE FOR CARRYING OUT THE INVENTION

[0017] Hereinafter, referring to the accompanying drawings, preferred embodiments of an information reading device, an authentication information generating device, an information reading method, an authentication information generating method, an information reading program, an authentication information generating program, and a recording medium according to the present invention Will be described in detail.

[0018] (Embodiment)

First, a functional configuration of an information reading system that is useful in the embodiment will be described. FIG. 1 is a block diagram showing a functional configuration of an information reading system according to an embodiment. The information reading system 100 includes an information reading device 110 that reads information recorded on the recording medium 101, and an authentication information generating device 120 that generates authentication information for reading predetermined information recorded on the recording medium 101. The

The information reading apparatus 110 includes an identification information acquisition unit 111, an authentication information acquisition unit 112, a reading unit 113, and a reading control unit 114. The identification information acquisition unit 111 is unique to the recording medium 101. The medium identification information given to is acquired. The identification information acquisition unit 111 acquires the medium identification information by reading the medium identification information recorded on the recording medium 101, for example. Also, the identification information acquisition unit 111 acquires the medium identification information by, for example, user input.

The authentication information acquisition unit 112 acquires authentication information generated based on the medium identification information acquired by the identification information acquisition unit 111 and the device identification information uniquely assigned to the own device. For example, the authentication information acquisition unit 112 acquires the authentication information by transmitting the medium identification information and the device identification information to the authentication information generation device 120 and receiving the authentication information generated by the authentication information generation device 120. To do.

The reading unit 113 reads predetermined information recorded on the recording medium 101. The reading control unit 114 controls the reading unit 113 based on the authentication information acquired by the authentication information acquiring unit 112. For example, the reading control unit 114 inputs authentication information as a password for reading predetermined information recorded on the recording medium 101, and reads the predetermined information when authenticated.

[0022] The information recorded on the recording medium 101 is encrypted using the authentication information, and the read control unit 114 decrypts the information recorded on the recording medium 101 using the authentication information. It is also possible to hesitate. In this case, the authentication information is used as an encryption key for predetermined information recorded on the recording medium 101.

Next, a functional configuration of the authentication information generation device 120 will be described. The authentication information generation device 120 includes a reception unit 121, a generation unit 122, and a transmission unit 123. The receiving unit 121 receives the medium identification information uniquely assigned to the recording medium 101 and the device identification information uniquely assigned to the information reading apparatus 110 that reads the information recorded on the recording medium 101. Receive from 110. For example, the reception unit 121 receives the medium identification information and the device identification information transmitted by the authentication information acquisition unit 112 of the information reading device 110 via the network.

The generating unit 122 generates authentication information for reading predetermined information recorded on the recording medium 101 using the medium identification information and the device identification information received by the receiving unit 121. For example, the generation unit 122 performs medium identification information and device identification information with a specific function. The calculated value is calculated, and authentication information unique to the combination of the recording medium 101 and the information reading device 110 is generated.

The transmission unit 123 transmits the authentication information generated by the generation unit 122 to the information reading device 110. For example, the transmission unit 123 transmits the authentication information to the authentication information acquisition unit 112 of the information reading device 110 that has transmitted the medium identification information and the device identification information via the network.

[0026] Note that the exchange of medium identification information, device identification information, and authentication information between the information reading device 110 and the authentication information generating device 120 is not limited to transmission / reception via a network, and for example, the information is recorded. This may be done by transporting the recorded medium (separate from the recording medium 101).

Next, an information reading process by the information reading system 100 will be described. The information reading system 100 reads predetermined information recorded on the recording medium 101. At this time, an information reading process by the information reading apparatus 110 and an authentication information generating process by the authentication information generating apparatus 120 are performed.

FIG. 2 is a flowchart showing a procedure of information reading processing by the information reading device. In the flowchart of FIG. 2, the information reading device 110 first acquires medium identification information by the identification information acquisition unit 111 (step S201). Specifically, for example, the medium identification information recorded on the recording medium 101 is read.

Next, the authentication information acquisition unit 112 transmits the medium identification information and the device identification information to the authentication information generation device 120 (step S202), and waits until the authentication information is received (step S203: No Loop). At this time, the authentication information generation device 120 performs authentication information generation processing and generates authentication information.

[0030] Upon receiving the authentication information (step S203: Yes), the reading control unit 114 controls the reading unit 113 based on the authentication information to read predetermined information recorded on the recording medium 101 ( Step S204), the process according to this flowchart is terminated. When the predetermined information recorded on the recording medium 101 is encrypted using the authentication information, the reading control unit 114 decrypts the predetermined information recorded on the recording medium 101 using the authentication information. I'll do it. Through the above procedure, the information reading apparatus 110 performs predetermined information recorded on the recording medium 101. Read the information.

Next, an authentication information generation process by the authentication information generation device 120 will be described. FIG. 3 is a flowchart showing a procedure of authentication information generation processing by the authentication information generation apparatus. In the flowchart of FIG. 3, the authentication information generating apparatus 120 first waits until the receiving unit 121 receives the medium identification information and the apparatus identification information from the information reading apparatus 110 (Step S 301: No Norep). ).

When the medium identification information and the device identification information are received (step S301: Yes), the authentication information generating device 120 generates authentication information by the generation unit 122 (step S302). Then, the authentication information generated at step S302 is transmitted by the transmission unit 123 (step S303), and the processing according to this flowchart is terminated.

[0033] As described above, according to the information reading system 100 according to the embodiment, from the medium identification information uniquely given to the recording medium and the device identification information uniquely given to the own apparatus. Based on the generated authentication information, the information recorded on the recording medium is read. As a result, it is possible to prevent the predetermined information recorded on the recording medium from being read indefinitely. In particular, when the prescribed information is confidential information or when the information itself is distributed as a product, it is possible to prevent unauthorized persons from reading the information illegally.

[0034] Further, by transmitting / receiving medium identification information, apparatus identification information, and authentication information via a network, the information recorded on the recording medium can be read immediately. Furthermore, by encrypting predetermined information using authentication information, the information recorded on the recording medium can be more securely protected.

Example

Next, an example of the information reading system 100 that works on the above-described embodiment will be described. In the following embodiment, a case will be described in which the information reading system 100 is applied to update of map data of the navigation device 400 mounted on a vehicle. In the configuration of the information reading system 100, the recording medium 101 is a DVD-ROM on which map data is recorded, the information reading device 110 is a navigation device 400, and the authentication information generating device 120 is a management server (not shown). [0036] (Hardware configuration of navigation device 400)

First, the hardware configuration of the navigation device 400 will be described. FIG. 4 is a block diagram showing the hardware configuration of the navigation device. In FIG. 4, a navigation device 400 includes a CPU 401, a ROM 402, a RAM (memory) 403, a magnetic disk drive 404, a magnetic disk 405, an optical disk drive 406, an optical disk 407, and an audio 1 / F (interface). 408, a microphone 409, a speaker 410, an input device 411, an image IZF 412, a camera 413, a display 414, a communication IZF 415, a GPS unit 416, and various sensors 417. Each component 401 to 417 is connected by a bus 420.

First, the CPU 401 governs overall control of the navigation device 400. The ROM 402 records programs such as a boot program, a communication program, a database creation program, and a data analysis program. Furthermore, the ROM 402 records device identification information (hereinafter referred to as a hard ID) that uniquely identifies each navigation device 400. RAM403 is used as a work area for CPU401.

The magnetic disk drive 404 controls reading and writing of data to the magnetic disk 405 according to the control of the CPU 401. The magnetic disk 405 records data written under the control of the magnetic disk drive 404. As the magnetic disk 405, for example, HD (node disk) or FD (flexible disk) can be used.

In addition, the optical disk drive 406 controls data reading / writing to the optical disk 407 in accordance with the control of the CPU 401. The optical disk 407 is a detachable recording medium from which data is read according to the control of the optical disk drive 406. As the optical disc 407, a writable recording medium can be used. Further, the removable recording medium may be a power MO of the optical disc 407, a memory card, or the like.

[0040] Another example of information recorded on the magnetic disk 405 and the optical disk 407 is route search, map data used for route guidance, and the like. The map data includes background data that represents features (features) such as buildings, rivers, and the ground surface, and road shape data that represents the shape of the road. Two-dimensional or three-dimensional data is displayed on the display screen of the display 414. Is drawn to. When the navigation device 400 is guiding a route, the map data and The current position of the vehicle acquired by the GPS unit 416 is displayed in an overlapping manner.

[0041] The road shape data further includes traffic condition data. The traffic condition data includes, for example, the presence / absence of traffic lights and pedestrian crossings, the presence / absence of highway doorways and junctions, the length (distance) of each link, road width, direction of travel, road type (high speed). Road, toll road, general road, etc.).

[0042] In addition, the traffic condition data is stored with past traffic information obtained by statistically processing the past traffic information based on the time of the season and the day of the week. The navigation device 400 obtains information on traffic jams currently occurring based on road traffic information received by communication IZF415, which will be described later. .

[0043] Here, the above-described map data is periodically updated. The map data will gradually become old due to the opening of new roads and changes in surrounding facilities. Therefore, the latest information is kept by updating the map data regularly. Force of Map Data Recording In the case of HD, which is an example of the magnetic disk 405, the update data is read from the optical disk 407 on which the update data is recorded, and the map data is updated. In addition, if the map data is recorded on a portable medium (mainly a disk) such as the optical disk 407, it is updated by exchanging the disk with the latest data. Hereinafter, in this embodiment, the map data recorded on the HD is updated with the update data recorded on a disk such as a DVD-ROM or CD-ROM.

The audio IZF 408 is connected to an audio input microphone 409 and an audio output speaker 410. Audio received by the microphone 409 is AZD converted in the audio IZF408. In addition, sound is output from the speaker 410. Note that the voice input from the microphone 409 can be recorded on the magnetic disk 405 or the optical disk 407 as voice data.

[0045] In addition, examples of the input device 411 include a remote controller, a keyboard, a mouse, and a touch panel that are provided with a plurality of keys for inputting characters, numerical values, various instructions, and the like. Furthermore, the input device 411 connects other information processing terminals such as a digital camera and a mobile phone terminal. Data input / output can be performed.

The video IZF 412 is connected to a video input camera 413 and a video output display 414. Specifically, the video I / F 412 includes, for example, a graphic controller that controls the entire display 414, a buffer memory such as VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. Based on the output image data, it is configured by a control IC that controls display of the display 414.

[0047] The camera 413 captures images inside and outside the vehicle and outputs them as image data. An image captured by the camera 413 can be recorded on the magnetic disk 405 or the optical disk 407 as image data. The display 414 displays icons, cursors, menus, windows, or various data such as characters and images. As this display 414, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted.

In addition, the communication IZF 415 is connected to a network via radio and functions as an interface between the navigation device 400 and the CPU 401. The communication IZF 415 is further connected to a communication network such as the Internet via radio and functions as an interface between the communication network and the CPU 401.

[0049] Communication networks include LANs, WANs, public line networks and mobile phone networks. Specifically, the communication IZF415 is composed of, for example, an FM tuner, VICS (Vehicle Information and Communication System) Z beacon resino, a wireless navigation device, and other navigation devices. Get road traffic information such as traffic regulations. VICS is a registered trademark.

[0050] In addition, the GPS unit 416 calculates information indicating the current position of the vehicle (the current position of the navigation device 400) using received waves from GPS satellites and output values from various sensors 417 described later. The information indicating the current location is information specifying one point on the map data, for example, latitude / longitude and altitude. Further, the GPS unit 416 outputs an odometer, a speed change amount, and an azimuth change amount using output values from the various sensors 417. This makes it possible to analyze dynamics such as sudden braking and sudden handle.

[0051] The various sensors 417 are a vehicle speed sensor, an acceleration sensor, an angular velocity sensor, and the like. The output value is used for the calculation of the current point by the GPS unit 416, the measurement of the change in speed and direction, the determination of whether or not to operate the drive recorder function, and the like. Further, the various sensors 417 may detect whether a user operates a vehicle handle or a brake. Furthermore, the output values of various sensors 417 can be used as data to be recorded with the drive recorder function.

Of the functional configuration of the information reading apparatus 110 according to the embodiment, the identification information acquisition unit 111 and the reading unit 113 are controlled by the optical disk drive 406, and the authentication information acquisition unit 112 is controlled by the communication IZF415. Each of the units 114 realizes its function by the CPU 401.

[0053] (Map data update process of navigation device 400)

Next, the map data update process of the navigation device 400 will be described. As described above, the navigation device 400 updates the map data recorded on the HD with the update data recorded on the disc such as DVD-ROM or CD-ROM. To read the update data recorded on the disk, the identification information (hereinafter referred to as disk ID) uniquely assigned to the disk and the node ID and force uniquely assigned to the navigation device 400 are also generated. Is required.

[0054] The disk ID is managed by a management server that monitors the information in the disk so that it can be used properly. The management server accepts a password transmission request from the user of each disk, and generates and transmits a password if it is determined that the transmission request is authorized. The management server and the navigation device 400 exchange information (disk ID, hard ID, password, etc.) via the network, for example. Further, for example, information may be exchanged by transporting a recording medium on which such information is recorded.

FIG. 5 and FIG. 6 are flowcharts showing the procedure of the map data update process of the navigation device. In the flowchart of FIG. 5, the navigation apparatus 400 first waits until a disk is inserted into the optical disk drive 406 (step S 501: No loop). When the disc is inserted (step S501: Yes), it is determined from the header information of the inserted disc whether or not the map data is recorded on the disc (step S502). [0056] When the map data is recorded (step S502: Yes), the recorded map data is compared with the currently recorded map data to determine whether or not the version has a newer version (step S502: Yes). S503). In the case of a newer version (step S503: Yes), the disk ID is also read out from the disk force (step S504). Here, each disk is given a disk ID as unique identification information at the time of shipment from the factory. The disk ID is managed by the management server described later.

[0057] On the other hand, in step S502, when no map data is recorded on the disc (step S502: No), the recorded map data is compared with the currently recorded map data. If not (Step S503: No), the process according to this chart is terminated. It should be noted that the recorded map data is now recorded! If it is not a version, it may be updated if the user wishes.

When the disk ID is read in step S504, the navigation device 400 reads the hard ID recorded in the ROM 402 (step S505) and transmits the disk ID and hard ID to the management server (step S506). . That is, a password transmission request is made to the management server, and the process proceeds to step S507 in FIG.

[0059] Turning to FIG. 6, after transmitting the disk ID and hard ID in step S506, the navigation device 400 waits until the password is returned from the management server (step S507: No loop). For example, the management server calculates a password by calculating a disk ID and a hard ID using a predetermined password generation function. When the password is returned (step S507: Yes), the navigation device 400 verifies the password (step S508).

[0060] For password verification, for example, the same password generation function as that of the management server is saved in advance on the navigation device 400 side, and the disk ID and hard ID are calculated using the password generation function. Calculate the password. The determination is made based on whether or not the password returned from the management server matches the verification password calculated by the navigation device 400. [0061] If the verification is successful (step S509: Yes), the map data recorded on the disk is read (step S510), and the map data recorded on the HD is updated (step S511). The process ends. On the other hand, if collation cannot be performed (step S509: No), an error message is displayed on the display 414 or the like (step S512), and the processing according to this flowchart is terminated.

[0062] At this time, the fact that unauthorized access to the map data has occurred may be transmitted to the management server. If an error message appears, the user may have inserted the wrong disc or entered the wrong node ID. The user will take measures according to the situation.

Next, password generation processing by the management server will be described. FIG. 7 is a flowchart showing the procedure of the nosword generation process by the management server. In the following description, processing when the navigation device 400 that uses map data is not specified at the time of disk shipment will be described. In the flowchart of FIG. 7, the management server issues a disk ID for uniquely identifying each disk to each disk on which map data is recorded (step S701).

At this time, the management server writes the disk ID corresponding to each disk in the disk management database. In the disk management database, in addition to the disk ID, for example, whether or not there is a request to send a user password for the disk corresponding to the disk ID, and if there is a transmission request, the navigation that uses that disk. The hard ID of device 400 is written. It is also possible to record the date and time when there was a transmission request and the presence or absence of an unauthorized transmission request.

Next, the system waits until it receives a transmission request for a password used to access map data recorded on the disc from navigation device 400 (step S702: No loop). The password transmission request transmitted from the navigation device 400 includes a disk ID and a node ID. When the password transmission request is received (step S702: Yes), the management server extracts the disk ID and the hard ID (step S703), and determines whether or not the transmission request has a legitimate authority (step S704). .

[0066] Whether or not the transmission power of the authorized authority is required is determined by, for example, using a disk management database. Refer to and determine whether a password has been issued for the corresponding disk ID. If no word is issued yet, it is determined that the transmission request is from a legitimate disk purchaser (legitimate authority). Also, if a password has already been issued, refer to the hard ID corresponding to the issued password, and if it matches the hard ID included in the current transmission request, it is a re-transmission request with a legitimate authority. Judge. On the management server side, it is possible to authenticate only with the navigation device 400 without determining whether or not the transmission request is from a legitimate authorized person! /.

[0067] In the case of a transmission request with a legitimate authority (Step S704: Yes), the management server generates a map data reading password (Step S705), and returns the generated password to the navigation device 400 ( Step S706). Then, the disk management database is updated (step S707), and the processing according to this flowchart is terminated. The disk management database is updated, for example, by writing in the disk management database the presence / absence of a password transmission request for the disk ID and the hard ID of the navigation device 400 that made the transmission request.

On the other hand, if it is not a transmission request from a legitimate authorized person (step S704: No), an error message is returned to the navigation device 400 (step S708), and the processing according to this flowchart is terminated. At this time, the fact that such an unauthorized transmission request has been made may be written in the disk management database.

[0069] If the navigation device 400 that uses the map data is specified before shipping the disk, the hard ID is written in the disk management database together with the disk ID. When a password transmission request is made, it is determined by a legitimate authorized person depending on whether the hard ID included in the transmission request matches the hard ID recorded in the disk management database. It is determined whether or not the transmission request is possible.

[0070] In this case, the password can be generated by the management server prior to shipping the disk. For this reason, the map data encrypted using the password (or a value generated separately from the password using the disk ID and hard ID) as the encryption key may be written to the disk. As a result, the map data recorded on the disc can be more securely protected. [0071] As described above, according to the navigation device 400, a disk is created based on a password generated from a disk ID uniquely assigned to the disk and a hard ID uniquely assigned to the own device. Read the recorded information. This can prevent the information recorded on the disc from being read indefinitely. In particular, when the information recorded on the disc is confidential information or when the information itself is distributed as a product, it is possible to prevent unauthorized persons from reading the information illegally.

[0072] In addition, information recorded on the disc can be immediately read out by transmitting and receiving the disc ID, the hard ID, and the password via the network. Furthermore, if the hardware ID of the navigation device 400 that uses the map data can be identified with certainty, the map data encrypted with the password as the encryption key is recorded on the disk. It is possible to protect map data recorded on the map more firmly.

Note that the information reading method and authentication information generating method described in the present embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. it can. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read by the computer. This program may also be a transmission medium that can be distributed over a network such as the Internet! /.

Claims

The scope of the claims

[1] Identification information acquisition means for acquiring medium identification information uniquely assigned to a recording medium on which predetermined information is recorded;

Authentication information acquisition means for acquiring authentication information generated based on the medium identification information acquired by the identification information acquisition means and the device identification information uniquely given to the own device;

Reading means for reading the predetermined information recorded on the recording medium; reading control means for controlling the reading means based on authentication information acquired by the authentication information acquisition means;

An information reading apparatus comprising:

[2] The authentication information acquisition means includes:

The medium identification information and the device identification information are transmitted to an authentication information generation device that generates authentication information for reading the predetermined information recorded on the recording medium, and the authentication information generation device transmits the authentication information. The information reading apparatus according to claim 1, wherein the information reading apparatus receives the information.

[3] The predetermined information recorded on the recording medium is encrypted using the authentication information,

The reading control means includes

3. The information reading apparatus according to claim 1, wherein the predetermined information recorded on the recording medium is decrypted using the authentication information.

[4] Medium identification information uniquely assigned to a recording medium on which predetermined information is recorded, and apparatus identification information uniquely assigned to an information reading apparatus that reads information recorded on the recording medium. Receiving means for receiving from the information reading device;

Generating means for generating authentication information for reading the predetermined information recorded on the recording medium, using the medium identification information and the apparatus identification information received by the receiving means;

Transmitting means for transmitting the authentication information generated by the generating means to the information reading device; An authentication information generating apparatus comprising:

[5] An identification information acquisition step of acquiring medium identification information uniquely given to a recording medium on which predetermined information is recorded;

An authentication information acquisition step of acquiring authentication information generated based on the medium identification information acquired by the identification information acquisition step and the device identification information uniquely given to the own device;

Based on the authentication information acquired by the authentication information acquisition step, the reading step of reading the predetermined information recorded on the recording medium;

An information reading method comprising:

[6] Medium identification information uniquely assigned to a recording medium on which predetermined information is recorded, and apparatus identification information uniquely assigned to an information reading apparatus that reads information recorded on the recording medium. A receiving step for receiving from the information reading device;

A generating step of generating authentication information for reading the predetermined information recorded on the recording medium, using the medium identification information and the device identification information received by the receiving step;

A transmitting step of transmitting the authentication information generated by the generating step to the information reading device;

An authentication information generation method characterized by comprising:

7. An information reading program causing a computer to execute the information reading method according to claim 5.

[8] An authentication information generation program causing a computer to execute the authentication information generation method according to claim 6.

[9] A computer-readable recording medium in which the information reading program according to claim 7 is recorded.

[10] A computer-readable recording medium on which the authentication information generating program according to claim 8 is recorded.