JP4211680B2 - Content protection device for remote monitoring system - Google Patents

Description

  The present invention relates to a content protection apparatus for a remote monitoring (watching) system using a server having web content on the Internet.

  Conventional general web content is stored in a local external terminal using a browser function, the source code is browsed, the storage location on the server is checked, etc. It was possible to divert freely. Also, streaming type content (eg, real, media, FLASH) has a protection function to prevent falsification, but it is difficult to prevent diversion such as posting on other sites.

  In an information processing apparatus that executes conventional content reproduction processing, for the purpose of preventing unauthorized use of content, an encrypted content is stored, and an index file including content usage condition information is stored in a storage unit. It is known to determine whether or not the content can be used based on the content usage condition information, and to execute a content key acquisition process applied to decryption of the encrypted content based on the determination (for example, a patent) Reference 1).

Further, in order to prevent the content from being illegally used, the content includes content data encrypted with the third key information and the first key information, and includes the second key information. The right of use as information relating to the use of the user is acquired, and the third key information is generated based on the first key information included in the acquired content and the second key information extracted from the right of use. An information processing apparatus that can decrypt content data using the generated third key information is known (for example, see Patent Document 2).
JP 2003-345660 A JP 2003-309545 A

By the way, in the social trend of expanding information disclosure, companies are increasingly using the Web distribution of financial results briefing sessions and general meeting of shareholders by moving images or a combination of moving images and still images. In such applications, stringent Li over timing type of web content is often used. In content such applications, it acquired the viewer through the browser, or the tampering, to or diverted is a serious problem. Among them, streaming type web content did not have a diversion prevention function.

  An object of the present invention is to solve the above-described problem, and to provide a content protection device for a remote monitoring system that prevents the diversion of a streaming type web content published on a web page and protects the web content. And

In order to achieve the above-mentioned object, the invention of claim 1 is characterized in that a home device that is arranged in a home and captures a predetermined area of the home with a camera and has a function of transmitting the captured image, and connected to the Internet to the home And a server device having a function of receiving a photographed image from the device via a telephone line and the Internet and transmitting the image to a portable terminal via the Internet and the telephone line. This server device is disclosed on a web page. The content protection device of the remote monitoring system having the content, wherein the in-home device is connected to the Internet via a network connection device and an Internet service provider (hereinafter referred to as ISP), and the server device performs various executions HTML (Hyper Text Markup Languag) containing a script (script) describing instructions and streaming type of web content consisting e), and an external text file that contains a separate predetermined key information from this web content, the web content, browser from an external terminal including a mobile terminal to access via the Internet When this web content is reproduced on an external terminal, the external text file is read according to the script, the key information is checked, and the key information is reproducible if the key information is correct. is a non-renewable to be right, toolbar browser in the script to be reproduced web content, is set to hide the menu bar and the address bar, and so the web content is not retrieved locally to the external terminal, The web content is outside Even if it is acquired locally by the local terminal, the web content cannot be reproduced because the external text file does not exist in the local environment.

According to the second aspect of the present invention, there is provided a home device that has a function of photographing a predetermined area in the home by using a camera and transmitting the taken image, and a telephone line for connecting the Internet to the home device. And a server device having a function of receiving the image via the Internet and transmitting the image to the portable terminal via the Internet and a telephone line, and the server device has a remote monitoring system having content published on a web page The home device is connected to the Internet via a network connection device and an Internet service provider (hereinafter referred to as ISP), and the server device is a script that describes various execution commands. ) Including HTML (Hyper Text Markup Language) And tools, and an external text file that contains a separate predetermined key information from this web content, the web content is viewable with a browser function from an external terminal including a mobile terminal and accessible via the Internet When this web content is played back on an external terminal, the external text file is read according to the script, the key information is checked, and if the key information is correct, playback is possible. If the key information is not correct, playback is impossible. It is what.

  According to a third aspect of the present invention, in the content protection apparatus of the remote monitoring system according to the second aspect, even if web content is acquired locally by an external terminal, the web text is not present in the local environment because the external text file does not exist. The content cannot be played back.

  According to the present invention, when reproducing the web content, the key information of the external text file is inspected before the reproduction, so even if the web content is acquired in the local environment by the viewer, the local environment Since there is no external text file, the content cannot be played or played on another website. Therefore, diversion of web content can be prevented.

  Hereinafter, a remote monitoring system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the overall configuration of the remote monitoring system. This remote monitoring system is a system that allows a user to check a captured image from outside the house in order to watch the situation inside the user's house from outside the house. 3 and a server device 4 (Web server) that remotely controls these home devices 1, 2, 3 via the Internet 7 and communicates with a mobile terminal 61 or a personal computer 62 as an external terminal 6. There are many in-home devices 1, 2, and 3 in actual operation (in the figure, three users are shown), and a portable terminal 61 and the like are also provided for each user.

  The in-home devices 1, 2, and 3 include control units 10, 20, and 30 for the operation of the system, cameras 11, 21, and 31, and human body sensors 13, 23, and 33 that photograph a predetermined watching area. As with other home appliances, a user installs an appropriate location in the house, for example, in a room where a child, an elderly person, a pet, or the like is present. It is connected to the Internet 7 via a line 8 and an Internet service provider (ISP). The in-home devices 1, 2, 3 execute a predetermined operation when the sensors 13, 23, 33 react, and execute a remote operation command received via the server device 4 in response to an operation instruction from the external terminal 6, The server device 4 has a function of uploading home information, for example, a photographed image.

  The server device 4 is connected to the Internet 7 via a router 45 and ISP, and includes servers 41, 42, 43, 44, etc. that operate this remote monitoring system and provide services. The received home information is notified to the corresponding external terminal 6 via the Internet 7 and the mobile phone line 9 or the telephone line 8, and a photographed image is transmitted to the external terminal 6 in response to a request from the external terminal 6. The server device 4 receives the remote operation command set by the external terminal 6 via the mobile phone line 9 or the telephone line 8 and the Internet 7, and receives the remote operation command via the Internet 7 and the phone line 8. The images are transferred to the devices 1, 2 and 3, and the images taken by the in-home devices 1, 2 and 3 are received via the telephone line 8 and the Internet 7, and the images are transmitted to the Internet 7 and the cellular phone line 9 Transfer to the corresponding external terminal 6 via the telephone line 8.

  The external terminal 6 can be connected to the server device 4 via the mobile phone line 9 or the telephone line 8 and the Internet 7. As such an external terminal 6, there are a mobile terminal 61 such as a mobile phone or PDA (Personal Digital Assistant) possessed by a user, and a personal computer 62. These external terminals 6 set a remote operation command for controlling the home device including a command to transmit images taken by the home devices 1, 2, 3 to the server device 4. Images taken at 2 and 3 are displayed.

  The home devices 1, 2, and 3 will be described in further detail. Of these, the in-home devices 1 and 2 have a configuration that can always be connected to the server device 4 via a broadband line such as ADSL and the Internet 7, and the in-home device 3 has a dial-up connection configuration.

The server device 4 can log in by authenticating the user ID and password transmitted from the external terminal 6 when the user remotely operates from the external terminal 6, and the user transmitted from the in-home devices 1, 2, 3 The function of managing the serial number of the in-home device corresponding to the ID, the status information, the dynamic global IP, and the remote operation command transmitted from the external terminal 6, and transmitting the remote operation command to the managed dynamic global IP address Have. The server device 4 constitutes a remote monitoring system having content published on a web page, and constitutes a content protection device that prevents the content from being tampered with maliciously. ing. The web content published on the web page can be browsed from the external terminal 6 including the portable terminal 61 via the Internet and browsed using the browser function, and the web content is reproduced on the external terminal 6. .

  Next, an outline of the operation of the remote monitoring system configured as described above will be described with reference to FIG. 2A shows the time of the sensor reaction operation between the home device 1 in FIG. 1 (here, the home device 1 that is always connected as a representative), the server device 4, and the mobile terminal 61 in the external terminal 6. FIG. It is a chart. (1) When the in-home device 1 detects an intruder or the like by the human body sensor 13, the in-home device 1 captures an image taken by the camera 11. (2) The in-home device 1 notifies the server device 4 of the sensor reaction (that an abnormality has occurred) and transmits the captured image to the server device 4. (3) The server device 4 stores the image sent from the in-home device 1, and (4) notifies the mobile terminal 61 of the sensor reaction by e-mail. The user learns that an abnormality has occurred due to the e-mail delivered to the mobile terminal 61, and (5) operates the mobile terminal 61 to connect the mobile terminal 61 to the server device 4 and request image transmission. (6) The server device 4 transmits the stored image to the mobile terminal 61 in response to the transmission request, and (7) the mobile terminal 61 displays the image sent from the server device 4. The user can confirm the image taken during the sensor reaction by looking at the display image.

Further, the user operates the mobile terminal 61, the mobile terminal 61 connected to the server device 4, the user ID by browser, by entering the password and login, remote control instructions to control the home device 1 (e.g. "Image transmission") can also be transmitted from the portable terminal 61 to the server device 4. At this time, the server device 4 authenticates the user ID and password, receives the remote operation command sent from the portable terminal 61, stores the remote operation command, and also stores the global IP address, that is, the corresponding A remote conversion command is transmitted to the home device 1. The in-home device 1 executes the remote conversion command received from the server device 4 and notifies the server device 4 that the execution of the remote operation command has been completed. The server device 4 notifies the portable terminal 61 by e-mail that the execution of the remote operation command has been completed. At this time, the user can confirm the captured image at home by operating the portable terminal 61 to connect to the server device 4 and request transmission of the stored image. In the remote monitoring system as described above, for example, the above-described captured image that is uploaded and stored from the in-home device 1 to the server device 4 via the Internet is used by the user using the mobile terminal 61 as the external terminal 6 and by the browser. One web content can be browsed by logging in to the server device 4 via the Internet. That is, such web content is accessed via the Internet by the portable terminal 61 of the external terminal 6 or the personal computer 62, can be browsed using the browser function, and is reproduced. At this time, as described above, the server device 4 is a content protection device of the remote monitoring system having the content published on the web page, and includes the captured image that can be browsed from the external terminal 6. Is transmitted to the portable terminal 61 or the personal computer 62 while protecting it from being unjustly leaked .

Next, web content protection of the server device 4 in the system will be described. The server device 4, access to web content browsable the system using a browser function is uploaded via the Internet from an external terminal 6. As shown in the time chart of FIG. 2 (b), where the external terminal 6 as a personal computer 62, when the content viewing request by browser from (11) PC 62, (12) the server device 4, the web content (13) The content is displayed on the personal computer 62. In this time chart, “content browsing request from personal computer 62” in (11) and “content delivery from server device 4” in (12) are (5) in the time chart in FIG. To “image transmission request from portable terminal 61” and “image transmission from server device 4” in (6). At this time, both the image transmission request by the portable terminal 61 and the content browsing request 2 by the personal computer 6 mean a content request to the server device 4, and the server device 4 responds to these content requests by sending a stored image. The included web content is transmitted to the mobile terminal 61 or the personal computer 62. FIG. 3 shows an example of the top page of web content.

  FIG. 4 shows a means for protecting web contents between the server apparatus 4 and the personal computer 62 browsing the contents. The web content of the server device 4 is a streaming type FLASH content created using Macromedia FLASH (program software suitable for creating moving images etc.) as a measure to prevent the diversion of the content. I use it. That is, the FLASH content includes information that the distribution source wants to distribute, and includes an HTML (Hyper Text Markup Language) 51 including a script describing various execution instructions. In the present invention, the server device 4 is provided with an external text file 53 separately from the web content, and predetermined key information 52 (password) is written therein. The HTML 55 is distributed to the local personal computer 62 in response to a content browsing request from the personal computer 62.

  FIG. 5 is a flowchart for reproducing the FLASH content on the personal computer 62. This content playback operation is referred to as a key file playback system. The external text file 53 is read according to a script (# 1), the key information 52 is checked to determine whether it is a specified value (# 2), and the key information 52 is correct. Reproduction is possible (# 3), and reproduction is impossible unless the key information 52 is correct. If the key information 52 is not found, an error is assumed (# 4).

In this key file playback method, the FLASH content to be played from the browser reads the external text file before playing the distribution information, checks the key information, if it is correct, performs the playback operation, otherwise, Contains a script that exits without playing the content. For this reason, even if a viewer acquires the content and tries to tamper or divert it, it is impossible to reproduce the content in a local environment other than the default server environment. End up.
Even if the content is acquired locally, the external text file 53 does not exist in the local environment and cannot be reproduced. Content that cannot be played loses its diversion value.

  Further, even if there is an attempt to acquire an external text file, it is impossible to know the address of the external text file on the server by setting a password read from the application software for the content. In addition, since the content is not acquired in the local environment, the browser toolbar, menu bar, and address bar are not displayed in the HTML script that is to play back the FLASH content, and the shortcut menu cannot be used. In this way, web content is prevented from being acquired locally by the external terminal.

  The present invention can be variously modified without departing from the spirit of the invention. For example, the remote monitoring system that is the target of content protection can be applied to other systems in the same manner, even in embodiments other than those described above.

1 is an overall configuration diagram of a remote monitoring system according to an embodiment of the present invention. The time chart figure of operation | movement among the household device in a system same as the above, a server apparatus, and a portable terminal. The figure which shows an example of the web page in a system same as the above. The figure which shows the means for content protection in a system same as the above. The flowchart figure which shows the reproduction | regeneration operation | movement for content protection in a system same as the above.

Explanation of symbols

1, 2, 3 Home device 10, 20, 30 Control unit 11, 21, 31 Camera 12, 22 Modem or broadband router (network connection device)
4 Server device 51 Web content 52 Key information 53 External text file 55 Delivered HTML
6 External terminal 61 Mobile terminal 62 Personal computer 7 Internet 8 Telephone line 9 Mobile telephone line

Claims (3)

A home device that is arranged in the home and captures a predetermined area of the home with a camera, and has a function of transmitting the captured image, and is connected to the Internet and receives the captured image from the home device via a telephone line and the Internet. And a server device having a function of transmitting the image to a portable terminal via the Internet and a telephone line, and this server device is a content protection device for a remote monitoring system having content published on a web page. ,
The in-home device is connected to the Internet via a network connection device and an Internet service provider (hereinafter referred to as ISP),
The server device
A streaming-type web content including HTML (Hyper Text Markup Language) including a script describing various execution instructions, and an external text file including predetermined key information separately from the web content,
The web content is viewable by using the browser function from the external terminal including a mobile terminal to access over the Internet, when you play this web content by the external terminal, reads the external text file in accordance with the script , check the key information, if correct, key information is playable, key information is non-renewable and to be right, hide the toolbar of the browser, the menu bar and address bar in the script to try to play the web content To prevent the web content from being acquired locally on an external device,
Even if the web content is acquired locally by an external terminal, the content protection apparatus of the remote monitoring system is characterized in that the web content cannot be reproduced because the external text file does not exist in the local environment. A home device that is arranged in the home and captures a predetermined area of the home with a camera, and has a function of transmitting the captured image, and is connected to the Internet and receives the captured image from the home device via a telephone line and the Internet. And a server device having a function of transmitting the image to a portable terminal via the Internet and a telephone line, and this server device is a content protection device for a remote monitoring system having content published on a web page. ,
The in-home device is connected to the Internet via a network connection device and an Internet service provider (hereinafter referred to as ISP),
The server device
Web content composed of HTML (Hyper Text Markup Language) including a script describing various execution instructions, and an external text file including predetermined key information separately from the web content,
The web content is viewable by using the browser function from the external terminal including a mobile terminal to access over the Internet, when you play this web content by the external terminal, reads the external text file in accordance with the script A content protection device for a remote monitoring system, wherein key information is checked and playback is possible if the key information is correct, and playback is impossible if the key information is incorrect.   3. The content protection apparatus for a remote monitoring system according to claim 2, wherein even if the web content is acquired locally by an external terminal, the web content cannot be reproduced because the external text file does not exist in the local environment.

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