JP2004220399A - Information acquisition system, information acquiring method, information acquisition program, and information recording medium with the program stored thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information acquisition system by which information can be acquired safely and quickly. <P>SOLUTION: This information acquisition system is provided with a first acquisition means which acquires encrypted information; a second acquiring means which conducts authentication, is an acquisition means for acquiring decoding information to decode the enciphered information, and provides confidentiality higher than that of the first acquisition means; and a decoding means which decodes the enciphered information by the decoding information. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an information acquisition device, an information acquisition method, an information acquisition program, and an information storage medium storing the information acquisition program.
[0002]
[Prior art]
In recent years, acquiring information via a network has been generally performed. For example, using a mobile phone service such as a mobile phone and a PHS (personal handyphone system), the mobile phone is connected to the Internet, and information is obtained from a server device that provides the information.
[0003]
As a specific example, a navigation device mounted on a vehicle acquires information such as weather information of a destination, a TV program guide linked to a vehicle position, facility information of a destination facility, and detailed map data around the destination when necessary. However, in this case, a server device on the Internet is accessed through a mobile phone (including a PHS terminal; the same applies hereinafter) connected to the navigation device, and necessary information is obtained from the server device. ing.
[0004]
However, in the mobile phone service, the data communication speed is, for example, 144 kbps. In particular, when acquiring information including image data, a long time is required for communication, and the communication fee becomes enormous.
[0005]
In recent years, public area wireless LAN (local area network) services have become widespread. In this service, wireless networks are installed in coffee shops, restaurants, airports, train stations, hotels, and the like, so that the Internet can be used. This public area wireless LAN service uses a wireless network technology such as IEEE 802.11b or Bluetooth. For example, when using IEEE 802.11b, the data communication speed is a maximum of 11 Mbps, which enables extremely high-speed communication as compared with the case where the above-described mobile phone service is used.
[0006]
[Problems to be solved by the invention]
However, in the public area wireless LAN, many users are provided with a network connection, so that unauthorized use such as eavesdropping and spoofing may be performed, which is a problem in terms of confidentiality (security).
[0007]
The present invention has been made in view of such a problem, and an example of the problem is, for example, when acquiring information via a network, an information acquisition device capable of acquiring information safely and quickly. To provide.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is an information acquisition device that acquires information that requires authentication at the time of acquisition, wherein a first acquisition unit that acquires the encrypted information, A second obtaining unit that performs authentication and obtains decryption information for decrypting the encrypted information; and a second obtaining unit that obtains the decryption information with higher secrecy than the first obtaining unit. And a decryption means for decrypting the encrypted information with the decryption information to constitute an information acquisition apparatus.
[0009]
In order to solve the above problem, the invention according to claim 5 includes a first acquisition unit and a second acquisition unit that acquires decryption information with higher confidentiality than the first acquisition unit. An information acquisition method for acquiring information that requires authentication at the time of acquisition, comprising: an authentication step of performing authentication by a second acquisition unit; an information acquisition step of acquiring encrypted information by a first acquisition unit; The method includes a decryption information obtaining step of obtaining decryption information for decrypting information encrypted by the obtaining means, and a decryption step of decrypting the encrypted information with the decryption information.
[0010]
In order to solve the above-mentioned problem, the invention according to claim 6 includes a first obtaining unit and a second obtaining unit that obtains decryption information with higher confidentiality than the first obtaining unit. A first acquisition unit for acquiring encrypted information, a computer included in an information acquisition device for acquiring information that requires authentication at the time of acquisition, and a computer for performing authentication and decrypting the encrypted information. Acquisition means for acquiring decryption information with higher secrecy than the first acquisition means, and decryption means for decrypting the encrypted information with the decryption information. Function and function.
[0011]
According to a seventh aspect of the present invention, there is provided an information recording medium in which the computer program according to the sixth aspect is recorded in a computer-readable manner.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment suitable for the present application will be described with reference to the drawings.
[0013]
The embodiment described below is an embodiment in a case where a navigation device acquires map data from a server device connected via a network.
[0014]
1. Information acquisition system First, an information acquisition system that acquires map data from a server device connected to the navigation device via a network in the navigation device will be described with reference to FIG. Here, FIG. 1 is a block diagram schematically showing the entire information acquisition system.
[0015]
As shown in FIG. 1, the information acquisition system S includes a navigation device 1, a server device 2, a public area wireless LAN network 3, a wireless LAN adapter 4, a mobile phone network 5, a mobile phone 6, an Internet network. 7 is mainly included.
[0016]
Here, the navigation device 1 that connects the wireless LAN adapter 4 and the mobile phone 6 functions as an information acquisition device. Then, the wireless LAN adapter 4 functions as a first obtaining unit, and the mobile phone 6 functions as a second obtaining unit.
[0017]
The navigation device 1 can connect the wireless LAN adapter 4 and the mobile phone terminal 6, and can access the server device 2 by two kinds of communication methods using the connected wireless LAN adapter 4 and the mobile phone terminal 6. . The first communication method is a communication method of connecting to the Internet network 7 via the public area wireless network 3 using the wireless LAN adapter 4 and accessing the server device 2 connected to the Internet network 7. The second communication method is a communication method of connecting to the Internet 7 via the mobile phone network 5 using the mobile phone terminal 6 and accessing the server device 2 connected to the Internet network 7.
[0018]
The server device 2 includes map data to be provided to the navigation device, and provides the map data to the navigation device 1 in an encrypted state. The encryption of the map data may be performed at the stage of storing the map data, or may be performed immediately before the map data is provided to the navigation device.
[0019]
Further, the server device 2 provides the navigation device 1 with a decryption key as decryption information for decrypting the encrypted map data.
[0020]
Further, the server device 2 authenticates a user who intends to obtain map data using the navigation device 1. For example, when a user who receives provision of map data performs user registration in the server device 2, the server device 2 issues authentication information such as an identification ID and a password. Then, when the authentication information is transmitted from the navigation device 1 to perform authentication, the server device 2 determines whether the authentication information is valid (same as the registered content) and determines whether the authentication information is valid. If determined, the user is authenticated.
[0021]
The public area wireless LAN network 3 is for connecting to an Internet network using a wireless LAN, and is, for example, a hot spot service network. The public area wireless LAN network 3 has one or a plurality of access points.
[0022]
The wireless LAN adapter 4 connects to the public area wireless LAN network 3 by wireless communication with an access point. The communication speed between the access point and the wireless LAN adapter is, for example, about 11 Mbps according to the IEEE 802.11b standard and 36 to 54 Mbps according to the IEEE 802.11a standard, and high-speed communication is possible. In addition, the communication fee generally employs a fixed amount billing method (a method of charging a fixed fee for unlimited use), which is lower in cost than communication by the mobile phone 6.
[0023]
The mobile telephone network 5 includes a plurality of base stations and a wired telephone network connecting the base stations. The base station performs wireless communication with the mobile phone 6, and one base station covers a range of 100 m to several km.
[0024]
The mobile phone 6 connects to the mobile phone network 5 by wireless communication with a base station. The mobile phone 6 is, for example, a mobile phone or a PHS terminal in a narrow sense, and may be a PC card type other than a general one having a liquid crystal and key buttons. The communication speed between the base station and the mobile phone 6 is, for example, about 144 kbps, and a pay-as-you-go method for charging a communication charge in packet units is generally employed.
[0025]
2. Navigation device Next, a first navigation device according to the present embodiment will be described with reference to FIG.
[0026]
A. Configuration of navigation device FIG. 2 is a block diagram showing the overall configuration of the navigation device 1. As shown in FIG. The navigation apparatus 1 shown in FIG. 2 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, and a DVD-ROM (Digital Versatile Disc-Only-Only Drive). , A hard disk 15, a sensor unit 16, a GPS (Global Positioning System) receiving unit 17, an interface 18, an input device 19, a display 20, a display control unit 21, a buffer memory 22, and an audio processing circuit 23. , A speaker 24, a communication interface 25, and a bus 26.
[0027]
2, the CPU 11 controls the operation of the entire navigation device 1. The CPU 11 is connected to each component of the navigation device 1 via the bus 26, reads and executes a control program stored in the ROM 12, and temporarily stores data being processed in the RAM 13. The control program stored in the ROM 12 includes a program that causes the CPU 11 to function as the first acquisition unit, the second acquisition unit, and the decryption unit of the present invention. Then, the CPU 11 reads and executes the program, and functions as all or a part of the first acquisition unit, the second acquisition unit, and the decryption unit.
[0028]
The DVD-ROM drive 14 reads map data from a DVD-ROM that stores map data.
[0029]
The hard disk 15 is a nonvolatile storage device that reads and writes map data and the like. The map data obtained from the server device 2 is stored in the hard disk 15.
[0030]
The sensor unit 16 includes various sensors necessary for detecting the position of the host vehicle. Specifically, it includes a vehicle speed sensor, a traveling distance sensor, a direction sensor, and the like for detecting a traveling state of the vehicle.
[0031]
The GPS receiver 17 receives radio waves from GPS satellites and outputs positioning data. Based on the sensor output from the sensor unit 16 and the positioning data from the GPS receiving unit 17, the CPU 11 comprehensively detects the own vehicle position of the traveling vehicle.
[0032]
The interface 18 performs an interface operation between the sensor unit 16 and the GPS receiving unit 17 and the CPU 11, and the CPU 11 uses the sensor output from the sensor unit 16 and the positioning data from the GPS receiving unit 17 to record the vehicle position data. Is required. The vehicle position data is collated with the above-described map data by the CPU 11 and corrected using a map matching process or the like.
[0033]
The input device 19 includes a key unit provided in the navigation system body or a remote controller including the key unit, and supplies a signal corresponding to the key input to the CPU 11 in order to perform a desired operation in the navigation operation.
[0034]
The display 20 is a display unit used for a navigation operation, and includes, for example, a CRT, a liquid crystal display element, and the like. On the display 20, map data is displayed in various modes under the control of the display control unit 21, and the position of the own vehicle is displayed as a car mark so as to be superimposed on the map data. Further, in the present embodiment, the information acquired from the server device 2 is displayed on the display 20 when necessary.
[0035]
The display control unit 21 generates display data to be displayed on the display 20, reads out the display data from the buffer memory 22 at an appropriate timing, and temporarily outputs the display data to the display 20 while temporarily storing the display data in the buffer memory 22.
[0036]
The audio processing circuit 23 generates a predetermined audio signal under the control of the CPU 11. The audio signal amplified to an appropriate level in the audio processing circuit 23 is output from the speaker 24 to the outside. Such an audio signal includes, for example, a guidance audio for guiding a route of a vehicle.
[0037]
The communication interface 25 performs an interface operation between the CPU 11 and the wireless LAN adapter 4 and the mobile phone 6. The navigation device 1, the wireless LAN adapter 4, and the mobile phone 6 may be connected by wire using a cable or the like, or may be connected wirelessly by using infrared light or the like.
[0038]
B. Map Data Acquisition Method Next, a method for the navigation device 1 connected to the wireless LAN adapter 4 and the mobile phone 6 to acquire map data from the server device 2 will be described with reference to FIG. Here, FIG. 3 is a flowchart showing the processing procedure of map data acquisition.
[0039]
First, prior to the processing in FIG. 3, the mobile phone 6 and the wireless LAN adapter 4 are connected to the communication interface 25 of the navigation device 1, and the power of each device is turned on. Then, an input to start the information acquisition process is made from the input device 19 of the navigation device 1, and the information acquisition process in FIG. 3 is started.
[0040]
When the processing in FIG. 3 is started, the navigation device 1 determines whether or not connection to the public area wireless LAN network 3 is possible (step S1). That is, the CPU 11 recognizes the connection state between the wireless LAN adapter 4 and the access point, and when it recognizes that the wireless LAN adapter 4 is in the connected state, determines that connection to the public area wireless LAN network 3 is possible. On the other hand, when it is recognized that the wireless LAN adapter 4 is not in the connected state, it is determined that connection to the public area wireless LAN network 3 is not possible. Then, in step S1, if the former is determined (step S1: Yes), the process proceeds to step S2, and if the latter is determined (step S1: No), the information acquisition process ends. When the latter determination is made (Step S1: No), Step S1 may be repeated.
[0041]
Next, the navigation device 1 determines whether or not the mobile phone 6 is usable (Step S2). That is, CPU 11 determines whether or not mobile phone 6 can talk. Then, in step S2, when it is determined that the mobile phone 6 is usable (step S2: Yes), the process proceeds to step S3, and when it is determined that the mobile phone 6 is not usable (step S2: No), the information acquisition process ends. I do. If it is determined that the device cannot be used (Step S2: No), Step S2 may be repeated.
[0042]
Next, the navigation device 1 performs user authentication using the mobile phone network 5 (step S3). That is, the CPU 11 accesses the server device 2 via the mobile phone network 5 and the Internet network 7 based on, for example, a URL specified in advance. Then, the server device 2 instructs the navigation device 1 to prompt the transmission of authentication information (for example, an authentication ID and a password), and the CPU 11 transmits a message such as “Please input authentication information” based on the instruction. The display 20 prompts the user to input the authentication information. Next, the CPU 11 transmits the authentication information input from the input device 19 to the server device 2 via the mobile phone network 5 and the Internet network 7 based on the display. The server device 2 that has obtained the authentication information determines whether or not the authentication information is legitimate, and authenticates the user when determining that the authentication information is legitimate. As described above, when the user is authenticated, the process proceeds to step S4. If the user has not been authenticated (if the server device 2 determines that the authentication information is not valid), the information acquisition process ends. In addition, instead of immediately terminating the information processing, even if a message such as "Authentication information is incorrect. Please enter the correct authentication information" is displayed and you are prompted to re-enter the valid authentication information Good.
[0043]
As described above, the navigation device 1 may input the authentication information from the input device 19 each time. However, the authentication information is stored in the hard disk 15 or the like, and the authentication information is called from the hard disk 15 or the like. You may make it transmit to the apparatus 2.
[0044]
Alternatively, the authentication information may be stored in the storage device of the mobile phone 6, and the CPU 11 may transmit the authentication information stored in the storage device of the mobile phone 6 to the server device 2. By storing the authentication information in the mobile phone 6 in this manner, even if the navigation device 1 is replaced, the authentication can be easily performed as long as the same mobile phone 6 is used. Also, even if a car or the like equipped with the navigation device 1 is stolen, the authentication information is not stolen.
[0045]
Next, the navigation device 1 specifies the map data desired to be acquired, and confirms whether or not the user agrees with the billing for the acquisition of the map data (step S4). In order to specify the map data, for example, a list of map data that can be provided from the server device 2 may be acquired, and the map data desired to be acquired may be selected from the list information. Further, the map data may be specified by directly inputting from the input device 19.
[0046]
In addition, confirmation of consent for billing may be performed, for example, every time map data is specified, or after confirming all map data desired to be acquired, confirmation of consent is collectively performed. Is also good.
[0047]
In step S4, when the acquisition request information is specified and the consent of the billing is obtained (step S4: Yes), the process proceeds to step S5. When the consent of the billing is not obtained (step S4: No), the information acquisition process is performed. finish. If the map data desired to be obtained is not specified or the consent of the billing cannot be obtained, the user may be prompted to specify the map data again or request the consent of the billing.
[0048]
Next, the navigation device 1 acquires connection information for acquiring map data from the server device 2 via the mobile phone network 5 (step S5). This connection information is information for the navigation device 1 to connect to the server device 2 via the public area wireless LAN network 3, and specifically, for example, is the URL of the server device 2 and a connection password.
[0049]
Next, the navigation device 1 connects to the server device 2 via the public area wireless LAN network 3 based on the connection information (step S6). Next, the navigation device 1 acquires the encrypted map data from the server device 2 via the public area wireless LAN network 3 (step S7).
[0050]
Here, encryption of the map data acquired by the navigation device 1 is performed in the server device 2. Specifically, as described above, the server device 2 may store the encrypted map data, select the map data specified in step S4 from the stored map data, and transmit the selected map data to the navigation device 1. Alternatively, the server apparatus 2 may store the information in an unencrypted state, select the map data specified in step S4, perform encryption processing, and then transmit the data to the navigation apparatus 1. Good.
[0051]
Next, the navigation device 1 acquires a decryption key for decrypting the encrypted information via the mobile phone network 5 (step S8). That is, the navigation device 1 acquires the decryption key corresponding to the encrypted map data acquired in step S8 from the server device 2 via the mobile phone network 5.
[0052]
Next, the navigation device 1 decrypts the encrypted map data obtained in step S7 using the decryption key obtained in step S8 (step S9). That is, the CPU 11 decrypts the encrypted map data with the decryption key to make the map data readable. Thereafter, the decoded map data is stored in the hard disk 15, read out by the CPU 11 when necessary, and displayed on the display 20.
[0053]
Finally, the navigation device 1 reports to the server device 2 that the information acquisition process has been completed (step S10). Then, the server device 2 performs a billing process for providing information. As a charging method, for example, a credit card number may be input when obtaining consent for charging in step S4, and the credit card may be debited for each information acquisition process. Alternatively, it may be debited from the usage fee payment account of the mobile phone 6 on a monthly basis or the like.
[0054]
As described above, according to the present embodiment, the navigation device 1 has excellent communication properties (high communication speed) and uses the public area wireless LAN network 3 having the characteristics of low communication cost. Since the encrypted map data is obtained and the decryption key is obtained by using the mobile phone network 5 having the characteristic of excellent confidentiality, the map data can be obtained quickly and safely. That is, since the encrypted map data is acquired by using the excellent communication property and low cost of the public area wireless LAN network 3, quick acquisition is possible even when the information capacity is large. Can also be reduced. In addition, since the authentication is performed by using the excellent confidentiality of the mobile phone network 5 and the decryption key is obtained, secure acquisition is possible.
[0055]
Further, when developing the navigation device 1 according to the present embodiment, the developer can delegate most of the mechanism for ensuring security (confidentiality) to the mobile phone 6, and reduce the development load. Becomes possible.
[0056]
3. Other embodiments In the above embodiment, the case where the navigation device 1 acquires information has been described, but the information acquisition device is not limited to the navigation device, and for example, acquires music information. It may be an audio device or the like.
[0057]
In the above embodiment, the case where map data is acquired from the server device 2 has been described. However, the information to be acquired is not limited to map data, and may be, for example, music information used for music reproduction or moving image used for moving image reproduction. It may be information or the like.
[0058]
In the above embodiment, the case where the server device 2 connected to the Internet network 7 is accessed has been described. However, the present invention is not limited to this case. For example, the public area wireless LAN network 3 and the mobile phone network 5 are directly connected to the server device. One may access the server device 2 via the Internet 7 and the other directly. Further, the server device 2 may be composed of a plurality of devices. For example, the authentication process and the information providing process may be performed by different devices.
[0059]
Further, in the above-described embodiment, the case has been described where the wireless LAN adapter is used as the acquisition unit having a high communication speed and low communication cost, and the mobile phone is used as the acquisition unit with high secrecy. However, the present invention is not limited to this.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an overall outline of an information acquisition system according to an embodiment.
FIG. 2 is a block diagram illustrating an overall configuration of the navigation device according to the embodiment.
FIG. 3 is a flowchart illustrating a processing procedure of map data acquisition according to the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Navigation apparatus 2 Server apparatus 3 Public area wireless LAN network 4 Wireless LAN adapter 5 Mobile telephone network 6 Mobile telephone 7 Internet network

Claims (7)

An information acquisition device for acquiring information that requires authentication at the time of acquisition,
First obtaining means for obtaining the encrypted information;
An acquisition unit that performs the authentication, and acquires decryption information for decrypting the encrypted information, and obtains the decryption information with higher secrecy than the first acquisition unit. 2 acquiring means;
Decryption means for decrypting the encrypted information with the decryption information;
An information acquisition device comprising: The information acquisition device according to claim 1,
The first acquisition unit and the second acquisition unit acquire the information and the decryption information by communication, respectively.
The information acquisition apparatus according to claim 1, wherein a communication speed of the first acquisition unit is higher than a communication speed of the second acquisition unit. The information acquisition device according to claim 1,
The first acquisition unit and the second acquisition unit acquire the information and the decryption information by communication, respectively.
The information acquisition apparatus according to claim 1, wherein a communication cost of the first acquisition unit is smaller than a communication cost of the second acquisition unit. The information acquisition device according to any one of claims 1 to 3,
An information acquisition apparatus, wherein the first acquisition unit and the second acquisition unit perform wireless communication. An information acquisition method for acquiring information that requires authentication at the time of acquisition by a first acquisition unit and a second acquisition unit that acquires decryption information with higher confidentiality than the first acquisition unit,
An authentication step of performing authentication by the second acquisition unit;
An information acquisition step of acquiring the information encrypted by the first acquisition unit;
A decryption information obtaining step of obtaining the decryption information for decrypting the encrypted information by the second obtaining means;
A decryption step of decrypting the encrypted information with the decryption information;
An information acquisition method comprising: The first acquisition unit and the second acquisition unit that acquires the decryption information with higher confidentiality than the first acquisition unit include a computer included in the information acquisition device that acquires information that requires authentication at the time of acquisition. ,
First obtaining means for obtaining the encrypted information;
An acquisition unit that performs the authentication and acquires the decryption information for decrypting the encrypted information, and acquires the decryption information with higher secrecy than the first acquisition unit. Second acquisition means;
Decryption means for decrypting the encrypted information with the decryption information;
A computer program characterized by functioning as a computer. An information recording medium, wherein the computer program according to claim 6 is recorded so as to be readable by the computer.

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