JP3539146B2 - Use condition violation check method and apparatus for work, and storage medium storing program for use condition violation check for work - Google Patents

Use condition violation check method and apparatus for work, and storage medium storing program for use condition violation check for work Download PDF

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Publication number
JP3539146B2
JP3539146B2 JP21537897A JP21537897A JP3539146B2 JP 3539146 B2 JP3539146 B2 JP 3539146B2 JP 21537897 A JP21537897 A JP 21537897A JP 21537897 A JP21537897 A JP 21537897A JP 3539146 B2 JP3539146 B2 JP 3539146B2
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Japan
Prior art keywords
work
server
use
watermark information
step
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JP21537897A
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Japanese (ja)
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JPH1166009A (en
Inventor
勇二 下見
克明 宮保
喜義 山中
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日本電信電話株式会社
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Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and a device for checking a work use condition violation, and a storage medium storing a program for checking a work use condition violation. The present invention particularly violates usage conditions such as copying or reselling arbitrarily when registering a copyrighted work such as a digital image and a moving image on a server and publishing or selling the same via a network such as the Internet. The present invention relates to a method and an apparatus for checking a use condition violation of a copyrighted work, and a storage medium storing a program for checking a use condition violation of a copyrighted work, for checking the use condition of the copyrighted work.
[0002]
[Prior art]
Conventionally, when publishing or selling a copyrighted work such as a photograph on the Internet, in order to check whether the purchaser has violated the use conditions such as the expiration date, the seller accesses the purchaser's server. , Search for images sold by human eyes, check if they violate the terms of use, and if so, notify the buyer of the violation, and notify the user of suspension of use, etc. It is carried out.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional method, since the copyrighted work is manually checked, there is a problem that an error easily occurs, time is required, and the cost increases accordingly.
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in consideration of the use conditions and violation checks of copyrighted works such as digital images and moving images distributed through a network such as the Internet. It is an object of the present invention to provide a use condition violation checking method and apparatus, and a storage medium storing a use condition violation check program for a work.
[0004]
[Means for Solving the Problems]
FIG. 1 is a diagram for explaining the principle of the present invention. The method of the present invention shown in FIG. 1 is used by a device for checking violations of use conditions of a work, which is necessary when publishing or selling a work including a digital image and a moving image via a network including the Internet. A method of checking a use condition violation of a copyrighted work,
A work providing step in which the work providing means provides the user with the original work in which the watermark information including the work identification information and the user information is embedded ;
Storage means, corresponding to the watermark information and the watermark information storage step of storing the conditions, including the URL of the user servers that are permitted to use in the management database (step 1),
A search step of extracting a URL of the user server from the management database and detecting a server using the copyrighted work using the URL as a search condition (step 2);
Watermark information obtaining means for obtaining watermark information embedded in the literary work used by the server (step 3);
Check step checking means, by obtaining the use condition corresponding to the watermark information embedded in the work from the management database, the use of the copyrighted work according to the server checks whether among violates the above conditions ( Step 4).
[0005]
According to the method for checking violation of use conditions of a work according to the present invention, a specific work in use is detected by a server connected to a network to check for violation of use conditions. conditions of use violation of the use of copyrighted material due to the server is automatically checked.
In the method for checking the use condition violation of a work according to the present invention, the search step includes:
Searching the server for a server that matches a search condition in a form that includes the URL of the user server ;
Obtaining hypertext from the detected server;
Detecting a tag indicating the presence of the work from the hypertext.
The watermark information acquiring step includes:
Downloading the file of the work indicated by the tag;
Reading the watermark information of the copyrighted work from the downloaded file of the copyrighted work.
[0006]
As a method for retrieving a copyrighted work, as a method other than the method using the tag as described above, a method of searching all directories in the server and checking the existence of the copyrighted work may be used. Therefore, the search step includes a step of detecting, from the servers, a server that matches a search condition including a URL of the user server ,
Searching all directories of the detected server to detect the presence of the copyrighted work,
The watermark information acquiring step includes:
Downloading the file of the detected copyrighted work;
Reading the watermark information of the work from the downloaded file of the work.
[0007]
Furthermore, the conditions include the use life limit as the use conditions are used.
FIG. 2 is a diagram illustrating the principle of the present invention. The apparatus of the present invention shown in FIG. 1 is used to publish or distribute a literary work including digital images and moving images through a network including the Internet, and to provide the user with the literary work in a content management server. A use condition violation check device 100 for a work for checking use conditions ,
A work providing means 110 for providing a user with an original work in which watermark information including work identification information and user information is embedded;
Storage means 120 for storing in the management database 10 usage conditions including the watermark information and the URL of the user server permitted to use , corresponding to the watermark information;
Detecting means 130 for extracting a URL of the user server from the management database 10 and detecting a server using the copyrighted work using the URL as a search condition ;
Watermark information obtaining means 140 for obtaining watermark information embedded in the copyrighted work used in the server;
By obtaining a use condition corresponding to the watermark information embedded in the work from the management database, a check means 150 for checking whether the use of the work by the server does not violate the use condition is obtained. Become.
[0008]
A search unit that detects a server that matches a search condition including a URL of the user server from among servers;
Means 134 for obtaining hypertext from the detected server;
Means 136 for detecting a tag indicating the presence of a copyrighted work from the hypertext ,
The watermark information acquisition means 140
Means 142 for downloading the file of the work indicated by the tag,
Means 144 for reading the watermark information of the copyrighted work from the downloaded file of the copyrighted work.
I do.
[0009]
The search means 130,
Means for detecting a server that matches a search condition in a form that includes the URL of the user server from among the servers;
Means for detecting the presence of a copyrighted work by searching all directories of the detected server,
The watermark information acquisition means 140
Means 142 for downloading a file of the detected work,
Means 144 for reading the watermark information of the copyrighted work from the downloaded file of the copyrighted work.
The work provided means 1 1 0 and checking means 1 50 is used conditions including the use life limit as use conditions.
[0010]
A work executed to check use conditions of a work in a content management server that provides a user by publishing or distributing a work including digital images and moving images through a network including the Internet according to the present invention. The storage medium that stores the use condition violation check program of
A work providing step for providing a user with an original work in which watermark information including work identification information and user information is embedded;
A storage step of storing in the management database usage conditions including the watermark information and the URL of the user server permitted to use , corresponding to the watermark information;
A search step of extracting the URL of the user server from the management database and detecting a server using the copyrighted work using the URL as a search condition ;
A watermark information obtaining step of obtaining watermark information embedded in the literary work used in the server;
Obtaining a use condition corresponding to the watermark information embedded in the work from the management database, and executing a check step of checking whether use of the work by the server does not violate the use condition by the computer. Store the program to be executed.
[0011]
The search step is
Detecting a server matching from server to search form that contains the URL of the user's server,
Obtaining a hypertext from the retrieved server,
And a step of detecting a tag indicating the existence of a work from the hypertext,
The watermark information obtaining step includes:
And the step of downloading the files of copyrighted material that has been indicated by the tag,
And a step of reading watermarking information work from the file of the downloaded work.
[0012]
The search step is
Detecting a server that matches a search condition in a form including the URL of the user server from the servers;
Searching all directories of the detected server to detect the presence of a copyrighted work,
The watermark information obtaining step includes:
Downloading the file of the detected copyrighted work ;
Reading the watermark information of the copyrighted work from the downloaded file of the copyrighted work.
The work provided steps and checking steps, as the use conditions, use conditions including the use life limit.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 3 shows a system configuration to which the present invention is applied. System in the figure, the content management database 10, the content management server 20, Internet 30, (hereinafter referred to as server) n stand WWW server comprised 40 1 to 40 n. Internet 30 performs communication between the content management server 20 and the server 40 1 to 40 n. The server 40 can access the content management server 20 to purchase and use a copyrighted work such as a digital image or a moving image from the content management server 20.
[0014]
The content management server 20, the server 40 1-40 a server 40 m (1 ≦ m ≦ n) in the n when there is application for purchase (hereinafter, referred to as user server), the watermark information in the original image work ID as, author ID, embedding the user ID, and transmits to the user server 40 m. Further, in addition to the embedded information, a work name, an author name, and use conditions are inserted into the content management database 10. The use conditions include, for example, the expiration date of the original picture (product) and the URL of the user server 40 m that has applied for use, indicating the usable place information.
[0015]
Content management server 20 is further appropriate search conditions (URL, search character string or the like) on the basis of the searching server 40 1 to 40 n, the true search server 40 l (hereinafter, referred to as a check target server) Is detected, and the server 40l to be checked is accessed. The server to be checked is not limited to the user server to which the right to use the work is given, but may be a server to which the right to use the work is not given.
[0016]
The content management server 20 obtains a hypertext such as an HTML file from the server to be checked 40 l , searches the HTML for a tag indicating “the existence of a copyrighted work”, and if the corresponding tag is searched, Download the copyrighted work file in the tag.
Next, the content management server 20 reads out the work ID and the user ID embedded in the downloaded work as watermark information, and uses the work conditions and the user related to the work stored in the content management database 10. Retrieve the first name. The content management server 20 collates the information read from the copyrighted work used by the check target server 40 l with the information extracted from the content management database 10, thereby checking the copyrighted work in the check target server 40 l . Check that the use of the work does not violate the terms of use of the work.
[0017]
Content management database 10, the content management server 20 is watermark information and copyrighted name embedded in the original work, the author name, expiration date, to store the URL or the like of the user server 40 m, which is permitted to use.
FIG. 4 shows a first configuration of the content management server of the present invention. The content management server 20 includes a work providing unit 52, a server search unit 54, an HTML file acquisition unit 56, a memory 58, a work tag detection unit 60, a work download unit 62, a watermark information reading unit 64, and a use condition check unit 66. And a violation processing unit 68. FIG. 5 is a sequence chart showing a use condition check operation performed by the first configuration of the content management server according to the present invention.
[0018]
When accepting the use application from the user server 40 l (step 101), the copyrighted work providing unit 52 uses, for example, the existing digital watermarking technology (Japanese Patent Application No. 8-305370, Japanese Patent Application No. 8-338869). The work ID, creator ID, and purchaser ID are embedded in the original work (step 102), and the embedded information, the work name, the author name, the expiration date, and the URL of the user server are stored in the content management database 10. At the same time as writing (step 103), the original work in which the watermark information is embedded is distributed to the user server 401 (step 104). As a result, information as shown in FIG. 6 is embedded in the content management database 10.
[0019]
Server retrieval unit 54 in order to check whether the content management server 20 work illegally server 40 1 to 40 n exist that use to provide, for example, the information stored in the content management database 10 A search condition including a specified character string such as a URL generated based on the search condition is created (step 105), and a server is searched using the search condition (step 106). If there is a server that satisfies the search condition, that is, the server to be checked 40 l , the HTML file acquisition unit 56 accesses the server to be checked 40 l to acquire an HTML file (step 107) and stores it in the memory 58. I do.
[0020]
An example of the source of the HTML file stored in the memory 58 is shown below.
First line <HTML>
2nd line <HEAD>
3rd line <TITLE> ...... </ TITLE>
4th line </ HEAD>
5th line <BODY>
6th line <IMG SRC = "IMAGE.GIF" ALIGN = TOP>
7th line </ BODY>
8th line </ HTML>
From the image tag on the sixth line of the HTML file, for example,
http: //....../IMAGE.GIF
Is detected (step 108).
[0021]
Work download unit 62, work tag image file that there is found by the detection unit 60 (http: //....../IMAGE.GIF) download from the check target server 40 l (step 109 ) Is stored in the memory 58.
Next, the watermark information reading unit 64 reads the work ID and the user ID embedded in the work stored in the memory 58 (step 110). The use condition check unit 66 retrieves from the content management database 10 the expiration date and usable URL associated with the literary work ID and the user ID obtained by the watermark information read unit 64 (step 111), and checks the server 40 to be checked. It is checked whether or not l corresponds to a usable URL or whether or not the expiration date has expired (step 112), and it is determined whether or not the usage condition has been violated (step 113). The violation processing unit 68 is notified of the URL of the check target server 40 l that violates the use condition.
[0022]
The violation processing unit 62 notifies the server 401 that violates the use conditions of the illegal use of the copyrighted work, and if the use right is paid, performs a surcharge request processing (step 114). .
FIG. 7 shows a second configuration of the content management server of the present invention. The content management server 20 includes a work providing unit 52, a server search unit 54, a work search unit in server 70, a work download unit 62, a watermark information reading unit 64, a use condition check unit 66, and a violation processing unit 68. You. The second configuration shown in FIG. 7 is different from the first configuration shown in FIG. 4 in that the HTML file acquisition unit 56 and the work tag detection unit 60 of the first configuration are replaced with a work detection unit 70 in the server. This is different from the first configuration. The server search unit 54 searches the specified server, and sets the server of the search result as a check target server. The in-server work detection unit 70 searches all directories in the check target server 40l to detect the presence of the work, and notifies the work download unit 62 of information on the location of the detected work.
[0023]
The embedding of the watermark information in the original work described above is realized by, for example, a digital watermark embedding technique that embeds other information in the image information so as not to be perceived by a human and can extract the embedded information when necessary. You.
Hereinafter, the principle of the watermark embedding technique will be described. The embedding process in the digital watermark embedding technology includes a decomposition process, an orthogonal transformation process, an embedding process, a decomposition process, an inverse orthogonal transformation process, and a reconstruction process.
[0024]
In the decomposing process, the original image is decomposed into a plurality of blocks each having n pixels × m pixels. In the case of a moving image, it is divided into frames and the like, and each frame is decomposed into a plurality of blocks.
In the orthogonal transformation processing, orthogonal transformation such as discrete cosine transformation (DCT transformation) is performed on each block decomposed in the decomposition processing, and an n × m frequency component matrix is obtained. Prior to embedding the embedding information, the embedding position for deciding where to embed the embedding information in the frequency component matrix obtained by the orthogonal transformation process is determined by random numbers, and how much the frequency component value is changed at that position Is determined, and the determined embedding position and the determined amount are acquired as key information.
[0025]
In the embedding process, when embedding information is embedded, it is not necessary to embed all of the information in the frequency component matrix for one block, but may embed it across the frequency component matrices of a plurality of blocks. By selecting, for example, a low-frequency portion of the frequency component matrix as the embedding position, the embedding can be performed so that it cannot be perceived by humans. Further, by changing the change amount, the difference from the original value of the frequency component matrix can be changed, so that the deterioration of the image quality can be controlled. In the embedding process, the value of the frequency component matrix of each block is changed based on the embedding position and the change amount of the key information, and the embedding information is embedded.
[0026]
In the inverse orthogonal transform process, the frequency component matrix of each block in which the embedding information is embedded by the embedding process is subjected to inverse orthogonal transform to obtain a block image of n pixels × m pixels.
In the reconstruction processing, the block images obtained by the inverse orthogonal transform processing are connected to obtain a watermark image in which the embedded information is embedded.
[0027]
Next, a process for extracting the embedded information in step 110 will be described. Extraction of embedded information includes decomposition processing, orthogonal transformation processing, extraction processing, and the like. In the decomposing process, the watermark image is decomposed into a plurality of blocks each including n pixels × m pixels. In the orthogonal transformation processing, orthogonal transformation is performed on each block decomposed in the decomposition processing to obtain an n × m frequency component matrix. In the extraction process, the embedding position and the amount of change are obtained from the key information used in the embedding process at the time of embedding, and the embedding information is extracted from the frequency component matrix of each block.
[0028]
As described above, in the digital watermarking technique, (1) the embedded information cannot be extracted without the key information used at the time of embedding, and (2) the embedded information in the key information is not fixed because it is created by a random number. Decoding of embedded information is difficult. (3) Embedding embedded information so that humans cannot perceive it by devising the embedding position. (4) Controlling the degree of image quality degradation by changing the amount of change. There are features such as what can be done.
[0029]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following example, it is assumed that the check date is August 10, 1997, the expiration date is 90 days from the purchase date, and the expiration date is stored in the content management database 10 as a use condition for each purchase application. .
[0030]
FIG. 8 shows an example of the contents of the content management database according to one embodiment of the present invention. There are currently five purchase applications from the user server 40, and for each application, the image ID 11, the work name 12, the creator ID 13, the creator name 14, the expiration date 15, and the user server URL are stored in the content management database 10 It shall be registered in.
[0031]
It is also assumed that the image ID, the author ID, and the user ID are embedded in each of the works to be distributed by the watermark embedding technique, and are transmitted from the content management server 20 to the user server 40.
The server detection unit 54 of the content management server 20 obtains a URL of a certain user from the content management database 10.
http: // www. xxxx. co. jp /
Is extracted, and this URL is used as a search condition (step 105). Thereby, the server search unit 54 accesses the extracted URL (step 106). The HTML file acquisition unit 56 acquires the HTML file acquired by the access and stores it in the memory (Step 107). For example, the following HTML file is obtained.
First line <HTML>
2nd line <HEAD>
3rd line <TITLE> ...... </ TITLE>
4th line </ HEAD>
5th line <BODY>
6th line <IMG SRC = "IMAGE.GIF" ALIGN = TOP>
7th line </ BODY>
8th line </ HTML>
From the image tag on the sixth line of the HTML file, for example,
http: //....../IMAGE.GIF
Is detected (step 108).
[0032]
Work download unit 62, work tag image file that there is found by the detection unit 60 (http: //....../IMAGE.GIF) download from the check target server 40 l (step 109 ) Is stored in the memory 58. This image file is, for example, a work ID (PID-A) in the content management database of FIG.
[0033]
Next, the watermark information reading unit 64 reads the copyrighted work ID “PID-A” and the user ID “aaa” embedded in the image file stored in the memory 58 (Step 110). The use condition checking unit 66 includes a “97.8.1” expiration date associated with the work ID “PID-A” and the user ID “aaa” obtained by the watermark information reading unit 64 and a usable URL “ http://www.xxx.co.jp/ "is retrieved from the content management database 10 (step 111). Since the URL of the server 40l to be checked corresponds to the available URL "http://www.xxx.co.jp/", the use condition of the place of use is satisfied. However, the check date is August 10, 1997, and the expiration date is August 1, 1997, indicating that the expiration date has expired (step 112). Therefore, it is determined that the usage condition is violated (step 113). Accordingly, the violation processing unit 62 notifies the server 40l violating the use conditions that the copyrighted work is illegally used, and if the use right is paid, performs a surcharge request processing ( Step 114).
[0034]
When embedding the watermark information in the original image, the information item serving as the watermark information may be manually input from a keyboard or the like, or may be read from a dedicated information file and embedded.
Furthermore, in the above embodiment, the expiration date has been described as the usage condition, but the present invention is not limited to this example, and may be checked using various usage conditions, such as when payment of the fee has not been completed. It is possible to do.
[0035]
In the above embodiment, the description is made based on the configuration requirements of the content management server 20. However, the present invention is not limited to this example, and each configuration requirement of the content management server 20 is constructed by software (program). It may be stored in a disk device or the like, and installed on the computer of the content management server 20 as necessary to check for usage condition violations. Furthermore, the constructed program can be stored in a portable storage medium such as a floppy disk or a CD-ROM, and can be used for general purposes in a case where such a system is used.
[0036]
The present invention is not limited to the above embodiments, but can be variously modified and applied within the scope of the claims.
[0037]
【The invention's effect】
As described above, according to the present invention, a specific work in use is detected on a server connected to a network to check for violation of usage conditions, so that not only the server to which the work was provided but also the use Is automatically checked for use condition violations of the use of the work by a server that is not authorized.
[0038]
Furthermore, by embedding an image ID, an author ID, and a user ID as watermark information in the original image of the product and transmitting it to the user server via a network such as the Internet, the user server falsifies the information. Since it is not possible, it is impossible to illegally avoid collecting charges or use illegally.
Furthermore, in the case where the use is continued even though the expiration date has passed, there is a possibility that the usage conditions may be violated. Therefore, the information which seems to have reached the date is read from the management database. Then, the user server is accessed using the URL included in the information of the database, the image information in which the watermark information is embedded is obtained, the database is searched based on the watermark information, and By performing the collation, the use condition violation can be automatically checked without manual intervention.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining the principle of the present invention.
FIG. 2 is a principle configuration diagram of the present invention.
FIG. 3 is a system configuration diagram to which the present invention is applied.
FIG. 4 is a first configuration diagram of a content management server of the present invention.
FIG. 5 is a sequence chart showing a use condition violation check operation of the present invention.
FIG. 6 is a diagram showing contents of a content management database of the present invention.
FIG. 7 is a second configuration diagram of the content management server of the present invention.
FIG. 8 is a diagram showing an example of contents of a content management database according to one embodiment of the present invention.
[Explanation of symbols]
10 Management Database 100 Work Use Violation Checking Device 110 Work Provision Means 120 Storage Means 130 Server Search Means 140 Watermark Information Acquisition Means 150 Check Means

Claims (12)

  1. A method for checking violations of the use conditions of a copyrighted work, which is required when a copyrighted work including digital images and moving images is released or sold via a network including the Internet, and the use condition violation check device checks the use conditions. And
    A work providing step in which the work providing means provides the user with the original work in which the watermark information including the work identification information and the user information is embedded ;
    Storage means, corresponding to the watermark information and the watermark information, a storage step of storing the conditions, including the URL of the user servers that are permitted to use in the management database,
    A search step of extracting a URL of the user server from the management database and detecting a server using the copyrighted work using the URL as a search condition ;
    Watermark information obtaining means for obtaining watermark information embedded in the literary work used by the server;
    Checking means for obtaining, from the management database, use conditions corresponding to the watermark information embedded in the work, thereby checking whether the use of the work by the server does not violate the use conditions; A method for checking violations of the terms of use of a copyrighted work, comprising:
  2. The search step is
    Searching the server for a server that matches a search condition in a form that includes the URL of the user server ;
    Obtaining hypertext from the detected server;
    Detecting a tag indicating the presence of the work from the hypertext.
    The watermark information acquiring step includes:
    Downloading the file of the work indicated by the tag;
    2. The method according to claim 1, further comprising the step of reading watermark information of the copyrighted work from the downloaded file of the copyrighted work.
  3. The search step is
    Detecting a server that matches a search condition including a URL of the user server from among the servers;
    Searching all directories of the detected server to detect the presence of the copyrighted work,
    The watermark information acquiring step includes:
    Downloading the file of the detected copyrighted work;
    2. The method according to claim 1, further comprising the step of reading watermark information of the copyrighted work from the downloaded file of the copyrighted work.
  4. The conditions of use, condition violation checking method use of any one of claims 1 to 3, characterized in that the conditions including the use life limit.
  5. Terms of use of copyrighted work to check the terms of use of the copyrighted work in a content management server provided to users by publishing and distributing copyrighted works including digital images and moving images via networks including the Internet A violation checking device,
    A work providing means for providing a user with an original work in which watermark information including work identification information and user information is embedded;
    Storage means for storing in the management database usage conditions including the watermark information and the URL of the user server permitted to use , corresponding to the watermark information;
    Detecting means for extracting a URL of the user server from the management database and detecting a server using the copyrighted work using the URL as a search condition ;
    Watermark information obtaining means for obtaining watermark information embedded in the copyrighted work used in the server;
    Check means for checking whether use of the work by the server does not violate the use conditions by obtaining a use condition corresponding to the watermark information embedded in the work from the management database. A use condition checking device for a copyrighted work.
  6. The search means,
    Means for detecting a server that matches a search condition in a form that includes the URL of the user server from among the servers;
    Means for obtaining hypertext from the detected server;
    Means for detecting a tag indicating the presence of a copyrighted work from the hypertext,
    The watermark information obtaining means includes:
    Means for downloading the file of the work indicated by the tag,
    6. The apparatus according to claim 5, further comprising means for reading watermark information of the copyrighted work from the downloaded file of the copyrighted work.
  7. The search means,
    Means for detecting a server that matches a search condition in a form that includes the URL of the user server from among the servers;
    Means for detecting the presence of a copyrighted work by searching all directories of the detected server,
    The watermark information obtaining means includes:
    Means for downloading the file of the detected work,
    6. The apparatus according to claim 5, further comprising means for reading watermark information of the copyrighted work from the downloaded file of the copyrighted work.
  8. The conditions of use, use conditions violation checking device works of any one of claims 5 to 7, characterized in that the conditions including the use life limit.
  9. Terms of use of copyrighted work executed to check the terms of use of the copyrighted work in a content management server that provides users by publishing and distributing copyrighted works including digital images and moving images via networks including the Internet A storage medium storing a violation check program,
    A work providing step for providing a user with an original work in which watermark information including work identification information and user information is embedded;
    A storage step of storing in the management database usage conditions including the watermark information and the URL of the user server permitted to use , corresponding to the watermark information;
    A search step of extracting the URL of the user server from the management database and detecting a server using the copyrighted work using the URL as a search condition ;
    A watermark information obtaining step of obtaining watermark information embedded in the literary work used in the server;
    By obtaining a use condition corresponding to the watermark information embedded in the work from the management database, and a check step of using the work by the server checks that it does not violate the above use conditions
    Storage program storing a use condition violation check program for a copyrighted work, wherein the program causes a computer to execute the program .
  10. The search step is
    Detecting a server matching from server to search form that contains the URL of the user's server,
    Obtaining a hypertext from the retrieved server,
    Detecting a tag indicating the presence of a copyrighted work from the hypertext ,
    The watermark information obtaining step includes:
    And the step of downloading the files of copyrighted material that has been indicated by the tag,
    A step of reading the watermark information of copyrighted material from the file of the downloaded copyrighted material,
    Storage medium storing operating conditions violation checking program of claim 9 work according to this and characterized with.
  11. The search step is
    Detecting a server matching from server to search form that contains the URL of the user's server,
    And a step of detecting the presence of the detected search to work all directories on the server,
    The watermark information obtaining step includes:
    And the step of downloading the files of the detected copyrighted material,
    10. A storage medium storing a work use condition violation check program according to claim 9, further comprising a step of reading watermark information of the work from the downloaded file of the work.
  12. Above for use condition, the storage medium storing the use condition violation checking program of works of any one of claims 9 to 11, wherein the use of conditions including the use life limit.
JP21537897A 1997-08-11 1997-08-11 Use condition violation check method and apparatus for work, and storage medium storing program for use condition violation check for work Expired - Lifetime JP3539146B2 (en)

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WO2001048682A1 (en) * 1999-12-28 2001-07-05 Digimarc Corporation Digital watermarks as data proxies
GB0008437D0 (en) * 2000-04-05 2000-05-24 Sony Uk Ltd Identifying material
WO2001075794A2 (en) 2000-04-05 2001-10-11 Sony United Kingdom Limited Identifying material
JP2002259346A (en) * 2001-02-28 2002-09-13 Ntt Communications Kk System/device for protecting copyright, recording medium with copyright protection program recorded and copyright protection program
JP2003288534A (en) 2002-03-27 2003-10-10 Fujitsu Ltd Contents charging method, and system and processor for contents charging using the contents charging method
BRPI0615559A2 (en) * 2005-07-20 2017-09-12 Verimatrix Inc network user authentication system and method

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