JP2010044556A - Document tracking system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a document tracking system which can track a document without available identification information and a document with unregistered identification information assigned thereto. <P>SOLUTION: If a tracking scanner 20 or a tracking PC 21 designates a tracking object document, a content analysis server 2 extracts from a file server 1 a document having content similar in content to the tracking object document, and a tracking server 22 tracks a history of input/output for the extracted document to present a tracking result to the tracking scanner 20 or the tracking PC 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a document tracking system, and more particularly, to a document tracking system that tracks a route in which a document is duplicated or copied.

  In recent years, leakage of important documents has occurred in a wide range due to the development of IT systems, and information leakage has become a big problem. As countermeasures, for electronic documents, user authentication and access control, and for paper documents, psychological deterrence by adding a secret stamp, generation source determination by adding print information, and the like have been proposed.

  However, the security measures especially for paper documents are insufficient. For this reason, a paper document is uniquely identified in order to accurately grasp the distribution route of the document such as which printer was printed, which MFP was copied, and which scanner was scanned. The identifier to be recorded, the paper, and the operation information for the paper are recorded as a tracking log. When the user performs “tracking scan” on the target paper to be tracked by the digital multifunction peripheral, the multifunction peripheral detects the identifier from the target paper, There is one that analyzes the history and distribution destination of the paper based on the tracking log and shows the result to the user (for example, see Patent Document 1).

In addition, the distribution path of the electronic file can be traced later by applying the one-way function (hash function) to the image data read from the paper document by the scanner and using the calculated hash value as the identifier of the image data. By doing so, an electronic document obtained by scanning a paper document can also be set as a tracking target, and there are some which expand the tracking range of the distribution route of the document (for example, see Patent Document 2).
JP 2008-42666 A Japanese Patent Application No. 2008-039612

  However, the above-described conventional technique tracks the target document based on identification information for identifying a recording medium on which the target document is recorded (for example, a sheet on which a document to be scanned is recorded). However, there is a problem that it is not possible to track a document for which identification information cannot be obtained or a document to which identification information not registered is assigned.

  The present invention has been made to solve the conventional problems, and provides a document tracking system capable of tracking a document for which identification information cannot be obtained or a document to which identification information not registered is assigned. For the purpose.

  The document tracking system according to the present invention is a document tracking system that tracks input / output operations on a document, and the file is stored in a file server that stores the document and a feature amount acquired from the contents of the document stored in the file server. A feature table storage device for storing a feature table associated with registered document identification information for identification in advance, and distribution document identification information for identifying the document each time an input / output operation is performed on the document At least one terminal device, an operation table storage device for storing an operation table in which operation information representing an input / output operation by the terminal device is associated with the distribution document identification information, and a tracking target document in which a tracking target document is designated Obtaining a feature amount from the content of the document designated by the designation device and the tracking target document designation device, the obtained feature amount, A document identification information detecting device for detecting registered document identification information of a document whose content is similar to the document to be tracked by comparing with a feature amount included in the collection amount table, and the document identification information detecting device. A tracking process for extracting operation information representing an input / output operation for the document identified by the registered document identification information from the operation table and performing a tracking process for tracking an input / output history for the document based on the extracted operation information And a device.

  With this configuration, the document tracking system of the present invention extracts a document whose content is similar to the document to be tracked from the file server, and tracks the input / output history for the extracted document. It is possible to trace a document to which identification information that is not registered is assigned.

  The tracking target document specifying device acquires the distribution document identification information from the tracking target document, and the tracking processing device is configured to input the document identified by the distribution document identification information acquired by the tracking target document specifying device. The document identification information detection device that extracts operation information representing an output operation from the operation table, performs a tracking process for tracking an input / output history from a document stored in the file server based on the extracted operation information, and The registered document identification information of a document whose content is similar to the document to be tracked may be detected only when the result of the tracking process is not obtained.

  With this configuration, the document tracking system of the present invention can perform tracking based on the identification information for a document for which identification information that can be tracked is obtained.

  The document tracking system of the present invention includes a document monitoring device that monitors a document stored in a specific location of the file server, and the document monitoring device detects the change in the state of the document when the change is detected. The feature quantity table storage device may update the feature quantity table.

  With this configuration, the document tracking system of the present invention can update the feature amount table when the state of the document stored in the file server changes.

  Also, the document tracking system of the present invention is a document tracking system that tracks input / output operations on a document, and acquires at least distribution document identification information for identifying the document each time the input / output operation is performed on the document. One terminal device, a feature amount table storage device for storing a feature amount table in which the circulation document identification information is associated with a feature amount acquired from the content of the document, and operation information representing input / output operations by the terminal device. An operation table storage device for storing an operation table associated with the distribution document identification information, a tracking target document specifying device for specifying a tracking target document, and a feature amount from the contents of the document specified for the tracking target document specifying device And by comparing the acquired feature quantity with the feature quantity included in the feature quantity table, the content in the tracking target document is Document identification information detection apparatus for detecting distribution document identification information of similar documents, and operation information representing input / output operations for a document identified by distribution document identification information detected by the document identification information detection apparatus from the operation table And a tracking processing device that performs a tracking process for tracking an input / output history for the document based on the extracted operation information.

  With this configuration, the document tracking system of the present invention extracts a document whose content is similar to the document to be tracked from a document assigned with other identification information, and tracks the input / output history for the extracted document. It is possible to trace a document for which no information is obtained or a document to which identification information not registered is assigned.

  In addition, the tracking target document specifying device acquires the distribution document identification information from the tracking target document, and the tracking processing device performs processing for a document acquired by the tracking target document specifying device and identified by the distribution document identification information. Operation information representing input / output operations is extracted from the operation table, and based on the extracted operation information, a tracking process is performed for tracking an input / output history of a document identified by the distributed document identification information, and the document identification information The detection device may detect distribution document identification information of a document whose content is similar to the document to be tracked only when the result of the tracking process is not obtained.

  With this configuration, the document tracking system of the present invention can perform tracking based on this identification information for a document for which distribution identification information that can be tracked is obtained.

  In addition, when a plurality of results are obtained by the tracking process, the tracking processing device causes the tracking target document specifying device to output the plurality of results, and causes the user of the tracking target document specifying device to obtain one result. May be selected.

  With this configuration, the document tracking system of the present invention can narrow down the extracted documents to the user when many documents whose contents are similar to the document to be tracked are extracted.

  The feature quantity table storage device may acquire a document piece obtained by fragmenting the document as a feature quantity of the document.

  With this configuration, the document tracking system of the present invention can detect a document to be tracked even when the document to be tracked is included in another document.

  The tracking target document specifying device may be configured by a scanner that reads the tracking target document.

  With this configuration, the document tracking system of the present invention can designate a document to be tracked using a scanner.

  The tracking target document specifying device may specify a file name of the tracking target document.

  With this configuration, the document tracking system of the present invention can designate a document to be tracked by a file name.

  The distribution document identification information may be recording medium identification information for identifying a recording medium on which the content of the document is recorded.

  With this configuration, the document tracking system of the present invention can obtain the document identification information from the recording medium identification information for identifying the recording medium.

  Here, the recording medium identification information may be information based on a concavo-convex pattern on the surface of the paper as the recording medium, and may be a pattern of metal fibers randomly inserted into the paper as the recording medium. The information may be information based on an identifier recorded on an IC chip embedded in a sheet as the recording medium.

  The document tracking system of the present invention may further include a tracking result output device that outputs the result of the tracking process.

  With this configuration, the document tracking system of the present invention can present the tracking result of the tracked document to the user.

  The operation information may include user identification information for identifying a user who has performed an input / output operation represented by the operation information.

  With this configuration, the document tracking system of the present invention can specify a user who has performed an input / output operation on a tracked document.

  Further, the document tracking method of the present invention is a document tracking method for causing a computer to track input / output operations for a document stored in a file server, wherein the document has a feature amount acquired from the contents of the document stored in the file server. A feature amount table storing step for storing a feature amount table associated with registered document identification information for identifying the document in advance, and a distribution document identifier for identifying the document each time an input / output operation is performed on the document An identification information acquisition step for acquiring information, an operation table storage step for storing an operation table in which the operation information representing the input / output operation is associated with the distribution document identification information, and a tracking target document specification for specifying a tracking target document A feature amount from the content of the document specified in the tracking target document specifying step, and the acquired feature amount A document identification information detection step for detecting registered document identification information of a document whose content is similar to the document to be tracked by comparing the feature amounts included in the feature amount table, and detection in the document identification information detection step A tracking process step of extracting operation information representing an input / output operation for the document identified by the registered document identification information, from the operation table, and tracking an input / output history for the document based on the extracted operation information; Have

  Accordingly, the document tracking method of the present invention extracts a document whose contents are similar to the document to be tracked from the file server, and tracks the input / output history for the extracted document. Documents to which identification information that has not been assigned are assigned can be traced.

  The document tracking method of the present invention is a document tracking method for causing a computer to track input / output operations for a document, and obtains distribution document identification information for identifying the document every time the input / output operation for the document is performed. An identification information acquisition step, a feature amount table storage step for storing a feature amount table in which the distribution document identification information is associated with a feature amount acquired from the contents of the document, and operation information representing the input / output operation An operation table storing step for storing an operation table associated with document identification information, a tracking target document specifying step for specifying a tracking target document, and a feature amount obtained from the contents of the document specified in the tracking target document specifying step Then, by comparing the acquired feature quantity with the feature quantity included in the feature quantity table, A document identification information detecting step for detecting distribution document identification information of documents having similar contents, and operation information representing an input / output operation for a document identified by the distribution document identification information detected in the document identification information detection step. A tracking step of extracting from the table and tracking an input / output history for the document based on the extracted operation information.

  Therefore, the document tracking method of the present invention extracts a document whose contents are similar to the document to be tracked from a document to which other identification information is assigned, and tracks the input / output history for the extracted document. It is possible to trace documents that cannot be obtained or are assigned identification information that is not registered.

  The present invention can provide a document tracking system capable of tracking a document for which identification information cannot be obtained or a document to which identification information not registered is assigned.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 shows a document tracking system as a first embodiment of the present invention. The document tracking system according to the present embodiment includes a file server 1, a content analysis server 2, a client personal computer (PC) 10, a printer 11, multifunction peripherals 12 and 13, a scanner 14, a tracking scanner 20, A tracking PC 21 and a tracking server 22 are provided.

  In the present embodiment, the file server 1 constitutes a file server and a document monitoring device in the present invention, and the content analysis server 2 constitutes a feature amount table storage device and a document identification information detection device in the present invention. The client PC 10, the printer 11, the multifunction machines 12, 13 and the scanner 14 constitute a terminal device in the present invention.

  The tracking scanner 20 and the tracking PC 21 constitute a tracking target document designation device and a tracking result output device according to the present invention, and the tracking server 22 constitutes an operation table storage device and a tracking processing device according to the present invention.

  The file server 1 includes a computer device, and includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a hard disk device, an input device, a display device, a network module, and the like.

  The ROM and hard disk device of the file server 1 store a program to be executed by the CPU so that the computer device functions as the file server 1.

  A monitoring folder 40 is stored in the hard disk device of the file server 1. The monitoring folder 40 stores an electronic document (hereinafter referred to as “file”) that can be accessed by a terminal device such as the client PC 10.

  As shown in FIG. 2, the file server 1 includes a document monitoring unit 50, and the document monitoring unit 50 monitors the storage contents of the monitoring folder 40 and the monitoring folder setting unit 51 that sets the monitoring folder 40. The document storage monitoring unit 52 and the document registration requesting unit 53 that requests the content analysis server 2 to register the changed document when the stored contents of the monitoring folder 40 are changed.

  For example, when the document storage monitoring unit 52 detects that a new file has been registered in the monitoring folder 40 of the file server 1, the document registration requesting unit 53 stores the newly registered file in the monitoring folder 40. Registered document identification information is acquired from the document storage monitoring unit 52. Here, the registered document identification information includes a file name, a path, a generation date and time, a generation user name (user identification information), and the like of the file in the file server 1.

  Further, the document registration request unit 53 acquires the contents of the file (hereinafter referred to as “document data”) from the monitoring folder 40, and transmits the acquired document data and registered document identification information to the content analysis server 2. It has become.

  Similar to the file server 1, the content analysis server 2 is configured by a computer device and functions as the content analysis server 2 by a program executed by the CPU.

  The content analysis server 2 stores in advance a feature value table in which feature values acquired from the contents of a file stored in the monitoring folder 40 of the file server 1 are associated with registered document identification information of the file. Yes.

  The content analysis server 2 also includes a document registration unit 60, a document registration processing unit 61 that processes a registration request from the document registration request unit 53, and a document piece division unit 62 that divides document data into a plurality of document pieces. A feature amount table registration unit 63 that registers document pieces in the feature amount table, and a feature amount table storage unit 64 that stores the feature amount table.

  Here, the document piece may be obtained by dividing the document data into units of the number of characters, may be obtained by dividing each page equally, or may be divided into paragraph units, sentence units, or phrase units.

  When the document data transmitted by the document registration request unit 53 represents an image or video, the document registration processing unit 61 extracts character information from the image or video using OCR (Optical Character Reader) or the like. .

  The document piece dividing unit 62 receives the document data and registered document identification information extracted by the document registration processing unit 61, divides the received document data into a plurality of document pieces, and the divided document pieces and the numbers of the document pieces (Hereinafter referred to as “piece number”) and registered document identification information are output to the feature table registration unit 63.

  The feature quantity table registration unit 63 associates the document piece and piece number output by the document piece division unit 62 with the registered document identification information and registers them in the feature quantity table stored in the feature quantity table storage unit 64. It has become.

  In FIG. 1, the tracking server 22 is configured by a computer device, like the file server 1, and functions as the tracking server 22 by a program executed by the CPU.

  The tracking server 22 stores an operation table in which operation information representing input / output operations by terminal devices such as the client PC 10, the printer 11, the multifunction machines 12, 13 and the scanner 14 is associated with the distribution document identification information. .

  Here, the distribution document identification information is information for uniquely identifying a document. For example, recording medium identification information for identifying the recording medium is assigned to the document recorded on the recording medium as distribution document identification information.

  Here, when the recording medium is a sheet, the recording medium identification information includes a concavo-convex pattern on the surface of the sheet (hereinafter referred to as “paper pattern”), a pattern of metal fibers randomly inserted in the sheet, It is detected based on an identifier or the like recorded on a paper pattern or an IC chip embedded in the paper.

  In addition, a hash value obtained by using a hash function for document data of the file is assigned to the digitized document, that is, the file, as distribution document identification information.

  For example, when the file 30a is copied from the file server 1 to the client PC 10, the client PC 10 determines the input / output operation content (duplication), operation target identification information for identifying the operation target (registered document identification information of the file 30a). ), Operation information including operation date and time, user name (user identification information) and device ID (for example, MAC (Media Access Control) address assigned to the network interface of the terminal), and hash of document data in the file 30a The distribution document identification information, which is a value, is transmitted to the tracking server 22, and the tracking server 22 associates the operation information with the distribution document identification information and registers it in the operation table.

  When the document data of the file 30a is printed by the printer 11, the printer 11 performs input / output operation content (printing), operation target identification information (hash value of the document data of the file 30a), operation date and time, user name And the operation information including the device ID and the distribution document identification information which is the recording medium identification information of the paper 30b on which the document data of the file 30a is printed are transmitted to the tracking server 22, and the tracking server 22 transmits the operation information and the distribution information. The document identification information is associated and registered in the operation table.

  Here, the printer 11 includes a recording medium identification information detection unit that detects recording medium identification information from a sheet on which document data is printed. In this embodiment, the recording medium identification information detection unit detects a paper pattern as the recording medium identification information by irradiating a part of the surface of the paper with a laser and detecting the intensity distribution of the reflected light. To do.

  When the document data is read from the paper 30b by the multifunction devices 12 and 13, the multifunction devices 12 and 13 read the input / output operation content (scan) and the operation target identification information (recording medium identification information of the paper 30b). , The operation information including the operation date and time, the user name and the device ID, and the distribution document identification information which is a hash value of the read document data are transmitted to the tracking server 22, and the tracking server 22 transmits the operation information and the distribution document identification. Information is associated with the information and registered in the operation table.

  When the document data read by the multifunction devices 12 and 13 is printed, the multifunction devices 12 and 13 are configured to input / output operation details (printing), operation target identification information (hash value of the document data), The operation information including the operation date and time, the user name and the device ID, and the distribution document identification information which is the recording medium identification information of the sheets 30c and 30d on which the document data is printed are transmitted to the tracking server 22, respectively. The operation information and the distribution document identification information are associated with each other and registered in the operation table.

  Here, the multifunction peripherals 12 and 13 detect the recording medium identification information from the sheet from which the document data is read, and the second recording medium identification information from the sheet from which the document data is printed. Recording medium identification information detection unit.

  When the document data is read from the paper 30d by the scanner 14, the scanner 14 reads the input / output operation content (scan), operation target identification information (recording medium identification information on the paper 30d), operation date and time, user name, and The operation information including the device ID and the distribution document identification information that is the hash value of the read document data are transmitted to the tracking server 22, and the tracking server 22 associates the operation information with the distribution document identification information and operates the operation table. To register.

  Here, the scanner 14 includes a recording medium identification information detection unit that detects recording medium identification information from a sheet from which document data is read.

  The tracking scanner 20 includes a recording medium identification information detection unit that detects recording medium identification information from the sheet 30f when reading document data from the sheet 30f on which the document to be tracked is recorded. The distribution document identification information detected by the above is transmitted to the tracking server 22.

  Further, when the file 30g is designated as a tracking target document, the tracking PC 21 calculates the hash value of the document data of the file 30g as the distribution document identification information, and transmits the calculated distribution document identification information to the tracking server 22. It is supposed to be.

  Here, the tracking server 22 extracts the distribution document identification information from the operation table based on the distribution document identification information transmitted from the tracking scanner 20 or the tracking PC 21, and is included in the operation information associated with the extracted distribution document identification information. By detecting the operation target identification information, the distribution information representing the distribution route of the document is generated and returned.

  On the other hand, when the tracking server 22 cannot extract the element including the distribution document identification information from the operation table and distribution information cannot be obtained, or the distribution document identification information of the document to be tracked cannot be detected. In this case, the tracking scanner 20 transmits the document data read from the paper 30f to the content analysis server 2, and the tracking PC 21 transmits the document data of the file 30g to the content analysis server 2.

  Here, the content analysis server 2 divides the document data to be tracked transmitted from the tracking scanner 20 or the tracking PC 21 into a plurality of document pieces using the document registration processing unit 61 and the document piece dividing unit 62 described above. It has become.

  The content analysis server 2 detects a document piece having a correlation value higher than a predetermined threshold TH1 for each divided document piece based on the feature amount table, and the proportion of the detected document piece in the document data to be tracked is similar. The registered document identification information of a file (hereinafter referred to as “similar document”) having document data in which the calculated similarity is higher than a predetermined threshold TH2 is returned.

  Here, when a plurality of similar documents are detected, the content analysis server 2 causes the tracking scanner 20 and the tracking PC 21 to present information that allows the user to identify each similar document (for example, registered document identification information) for tracking. The scanner 20 and tracking PC 21 allow the user to select one similar document.

  When there are a plurality of similar documents, the content analysis server 2 may return registered document identification information of a similar document having document data with the highest similarity.

  The tracking scanner 20 and the tracking PC 21 transmit the registered document identification information returned from the content analysis server 2 to the tracking server 22. Here, the tracking server 22 extracts the operation information from the operation table based on the registered document identification information transmitted from the tracking scanner 20 or the tracking PC 21, and detects the distribution document identification information associated with the extracted operation information. By going, distribution information indicating the distribution route of the document is generated and returned.

  As described above, the tracking scanner 20 and the tracking PC 21 display an image with a genealogy or the like as shown in FIG. 3 with respect to the distribution information returned from the tracking server 22.

  The tracking operation of the document tracking system configured as described above will be described with reference to FIG. Hereinafter, a case where document data to be tracked is read from the paper 30f by the tracking scanner 20 will be described as an example.

  First, when document data to be tracked is read from the paper 30f by the tracking scanner 20, distribution document identification information is acquired from the paper 30f (step S1). Here, when the distribution document identification information is acquired (step S2: YES), the acquired distribution document identification information is extracted from the operation table by the tracking server 22 and associated with the extracted distribution document identification information. As the operation target identification information included in the operation information is detected by the tracking server 22, distribution information indicating the distribution route of the document is generated by the tracking server 22 (step S3).

  Here, when the distribution information is generated by the tracking server 22 (step S4: YES), the distribution information generated by the tracking server 22 is displayed on the display unit provided in the tracking scanner 20 (step S5). The tracking operation ends.

  On the other hand, when the distribution information is not generated by the tracking server 22 (step S4: NO), or when the distribution document identification information is not acquired at step S1 (step S2: NO), the paper is recorded by the tracking scanner 20. A similar document having document data similar to the document data read from 30f is detected by the content analysis server 2 from the monitoring folder 40 of the file server 1 (step S6).

  If a similar document is not detected (step S7: NO), the fact that the tracking target document could not be tracked is displayed on the display unit provided in the tracking scanner 20 (step S8). The operation ends.

  On the other hand, when a similar document is detected (step S7: YES), when a plurality of similar documents are detected (step S9: YES), information for allowing the user to identify each similar document is displayed on the display unit of the tracking scanner 20. One similar document is displayed by the user of the tracking scanner 20 (step S10).

  Next, the operation information is extracted from the operation table by the tracking server 22 based on the registered document identification information of the similar document, and the distribution document identification information associated with the extracted operation information is detected by the tracking server 22. Distribution information representing the distribution route of the document is generated by the tracking server 22 (step S11).

  Here, when the distribution information is generated by the tracking server 22 (step S12: YES), the distribution information generated by the tracking server 22 is displayed on the display unit provided in the tracking scanner 20 (step S5). The tracking operation ends.

  On the other hand, if the distribution information is not generated by the tracking server 22 (step S12: NO), the fact that the tracking target document could not be tracked is displayed on the display unit provided in the tracking scanner 20 (step S8). ) The tracking operation ends.

  As described above, the document tracking system according to the first exemplary embodiment of the present invention extracts a document whose content is similar to the document to be tracked from the file server 1, and records the input / output history for the extracted document. In order to trace, it is possible to trace a document for which identification information cannot be obtained or a document to which identification information not registered is assigned.

  In the present embodiment, the file server 1 constitutes a file server and a document monitoring apparatus in the present invention, and the content analysis server 2 constitutes a feature amount table storage apparatus and a document identification information detection apparatus in the present invention. The tracking scanner 20 and the tracking PC 21 constitute the tracking target document designating device and the tracking result output device in the present invention, and the tracking server 22 constitutes the operation table storage device and the tracking processing device in the present invention. However, the present invention is not limited to this.

  For example, the tracking server 22 may constitute a tracking target document specifying device, a tracking result output device, an operation table storage device, and a tracking processing device in the present invention. The tracking server 22 may further configure a feature amount table storage device and a document identification information detection device.

(Second Embodiment)
FIG. 5 shows a document tracking system as a second embodiment of the present invention. The document tracking system according to the present embodiment includes a file server 101, a content analysis server 102, a client PC 110, a printer 111, multifunction peripherals 112 and 113, a scanner 114, a tracking scanner 120, a tracking PC 121, and a tracking. And a server 122.

  In the present embodiment, the content analysis server 102 constitutes the feature amount table storage device and the document identification information detection device according to the present invention, and the client PC 110, the printer 111, the multifunction peripherals 112 and 113, and the scanner 114 are the present invention. The terminal device is configured.

  The tracking scanner 120 and the tracking PC 121 constitute a tracking target document designation device and a tracking result output device according to the present invention, and the tracking server 122 constitutes an operation table storage device and a tracking processing device according to the present invention.

  The file server 101 is configured by a computer device, and includes a CPU, a RAM, a ROM, a hard disk device, an input device, a display device, a network module, and the like.

  The ROM and hard disk device of the file server 101 store a program to be executed by the CPU so that the computer device functions as the file server 101. The hard disk device of the file server 101 stores a file that can be accessed by a terminal device such as the client PC 110.

  Similar to the file server 101, the tracking server 122 is configured by a computer device, and functions as the tracking server 122 by a program executed by the CPU.

  The tracking server 122 stores an operation table in which operation information representing input / output operations by each terminal device such as the client PC 110, the printer 111, the multifunction peripherals 112 and 113, the scanner 114, and the like is associated with the circulation document identification information. The input / output document data and the distribution document identification information are transmitted to the content analysis server 102.

  For example, when the file 30a is copied from the file server 101 to the client PC 110, the client PC 110 reads the input / output operation contents (copy), operation target identification information for identifying the operation target (registered document identification information of the file 30a). ), The operation information including the operation date and time, the user name and the device ID, the distribution document identification information which is the hash value of the document data of the file 30a, and the document data of the file 30a are transmitted to the tracking server 122. The operation information and the distribution document identification information are associated with each other and registered in the operation table, and the document data of the file 30a and the distribution document identification information are transmitted to the content analysis server 102.

  When the document data of the file 30a is printed by the printer 111, the printer 111 reads the input / output operation content (printing), operation target identification information (hash value of the document data of the file 30a), operation date and time, user name And the operation information including the device ID, the distribution document identification information which is the recording medium identification information of the paper 30b on which the document data of the file 30a is printed, and the document data of the file 30a are transmitted to the tracking server 122. The operation information and the distribution document identification information are associated with each other and registered in the operation table, and the document data and the distribution document identification information are transmitted to the content analysis server 102.

  Here, the printer 111 includes a recording medium identification information detection unit that detects recording medium identification information from a sheet on which document data is printed. In the present embodiment, the recording medium identification information detection unit detects a paper pattern as the recording medium identification information by irradiating a part of the surface of the paper with a laser and detecting the intensity distribution of the reflected light. It has become.

  When document data is read from the sheet 30b by the multifunction peripherals 112 and 113, the multifunction peripherals 112 and 113 perform input / output operation details (scanning) and operation target identification information (recording medium identification information of the sheet 30b). The operation information including the operation date and time, the user name and the device ID, the distribution document identification information which is the hash value of the read document data, and the read document data are transmitted to the tracking server 122. The tracking server 122 The information and the distribution document identification information are associated with each other and registered in the operation table, and the document data and the distribution document identification information are transmitted to the content analysis server 102.

  When the document data read by the MFPs 112 and 113 is printed, the MFPs 112 and 113 are used to input / output operation details (printing), operation target identification information (hash value of the document data), The operation information including the operation date and time, the user name and the device ID, the distribution document identification information which is the recording medium identification information of the sheets 30c and 30d on which the document data is printed, and the document data are transmitted to the tracking server 122, respectively. The tracking server 122 associates the operation information with the distribution document identification information and registers it in the operation table, and transmits the document data and distribution document identification information to the content analysis server 102.

  Here, the multifunction peripherals 112 and 113 detect the recording medium identification information from the sheet from which the document data is read, and the second recording medium identification information from the sheet from which the document data is printed. Recording medium identification information detection unit.

  When the document data is read from the paper 30d by the scanner 114, the scanner 114 reads the input / output operation content (scan), operation target identification information (recording medium identification information of the paper 30d), operation date / time, user name, and The operation information including the device ID, the distribution document identification information that is a hash value of the read document data, and the read document data are transmitted to the tracking server 122. The tracking server 122 transmits the operation information and the distribution document identification information. Are registered in the operation table, and the document data and the distribution document identification information are transmitted to the content analysis server 102.

  Here, the scanner 114 includes a recording medium identification information detection unit that detects recording medium identification information from a sheet from which document data is read.

  Similar to the file server 101, the content analysis server 102 is configured by a computer device, and functions as the content analysis server 102 by a program executed by the CPU.

  The content analysis server 102 receives the document data and the distribution document identification information transmitted by the tracking server 122, and stores a feature amount table in which the distribution document identification information is associated with the feature amount acquired from the document data. It has become.

  For example, as illustrated in FIG. 6, the multifunction machine 112 includes a scanning unit 141, a printing unit 142, and an operation information collection unit 143 that generates operation information. The scanning unit 141 includes an image reading unit 151 and a paper pattern detection unit 152 as a first recording medium identification information detection unit, and the printing unit 142 includes an image drawing unit 155 and second recording medium identification information. And a paper pattern detection unit 156 as a detection unit.

  The operation information collection unit 143 generates operation information representing the input / output operation performed on the multifunction machine 112, and the generated operation information and the distribution document identification information detected by the paper pattern detection unit 152 or the paper pattern detection unit 156. The document data read by the image reading unit 151 or the document data printed by the image drawing unit 155 is transmitted to the tracking server 122.

  The tracking server 122 associates the operation table storage unit 161 that stores the operation table, the operation information transmitted by the operation information collection unit 143, and the distribution document identification information in the operation table and registers them in the operation table, and also the operation information collection unit 143. Is provided with an operation table registration unit 162 that transmits the document data and the distribution document identification information transmitted to the content analysis server 102.

  The content analysis server 102 also includes a document registration unit 170, a document registration processing unit 171 that processes a registration request from the operation table registration unit 162, and a document piece division unit 172 that divides document data into a plurality of document pieces. And a feature quantity table registration unit 173 that registers document pieces in the feature quantity table, and a feature quantity table storage unit 174 that stores the feature quantity table.

  When the document data transmitted by the operation table registration unit 162 represents an image or video, the document registration processing unit 171 extracts character information from the image or video using OCR or the like.

  The document piece dividing unit 172 receives the document data and the distribution document identification information extracted by the document registration processing unit 171, divides the received document data into a plurality of document pieces, and the divided document piece, piece number, and distribution document The identification information is output to the feature amount table registration unit 173.

  The feature quantity table registration unit 173 associates the document piece and piece number output by the document piece division unit 172 with the circulation document identification information and registers them in the feature quantity table stored in the feature quantity table storage unit 174. It has become.

  In FIG. 5, the tracking scanner 120 has a recording medium identification information detection unit that detects recording medium identification information from the paper 30 f when reading document data from the paper 30 f on which the document to be tracked is recorded. The circulation document identification information and the document data detected by the identification information detection unit are transmitted to the tracking server 122.

  Further, when the file 30g is designated as a document to be tracked, the tracking PC 121 calculates the hash value of the document data of the file 30g as the distribution document identification information, and tracks the calculated distribution document identification information and the document data. The data is transmitted to the server 122.

  Here, the tracking server 122 extracts the distribution document identification information from the operation table based on the distribution document identification information transmitted from the tracking scanner 120 or the tracking PC 121, and is included in the operation information associated with the extracted distribution document identification information. By detecting the operation target identification information, the distribution information representing the distribution route of the document is generated and returned.

  On the other hand, when the element including the distribution document identification information cannot be extracted from the operation table and distribution information cannot be obtained, or the distribution document identification information of the document to be tracked cannot be detected. The tracking server 122 transmits the document data transmitted from the tracking scanner 120 and the tracking PC 121 to the content analysis server 102.

  Here, the content analysis server 102 divides the document data to be tracked transmitted from the tracking server 122 into a plurality of document pieces by using the document registration processing unit 171 and the document piece dividing unit 172 described above. .

  The content analysis server 102 detects a document piece having a correlation value higher than a predetermined threshold TH1 for each divided document piece based on the feature amount table, and the proportion of the detected document piece in the document data to be tracked is similar. The distribution document identification information of similar documents having document data whose calculated similarity is higher than a predetermined threshold TH2 is returned.

  Here, when a plurality of similar documents are detected, the content analysis server 102 causes the tracking scanner 120 and the tracking PC 121 to present information that allows the user to identify each similar document (for example, distribution document identification information) for tracking. The scanner 120 and the tracking PC 121 allow the user to select one similar document.

  When there are a plurality of similar documents, the content analysis server 102 may return the circulation document identification information of the similar document having the document data with the highest similarity.

  The tracking server 122 extracts the operation information from the operation table based on the distribution document identification information returned from the content analysis server 102, and detects the distribution document identification information associated with the extracted operation information. Distribution information representing the distribution route of the document is generated and returned.

  As described above, the tracking scanner 120 and the tracking PC 121 display the image with the genealogy and the like as shown in FIG. 3 with respect to the distribution information returned from the tracking server 122.

  Since the tracking operation of the document tracking system configured as described above is the same as the tracking operation described with reference to FIG. 4 in the first embodiment of the present invention, the description thereof is omitted.

  However, in this embodiment, every time an input / output operation is performed on a terminal device such as the client PC 110, the printer 111, the multifunction peripherals 112 and 113, and the scanner 114, it is the same as the feature amount table stored in the content analysis server 102. Documents with the contents of may be registered many times.

  Therefore, when similar documents are detected by the tracking operation, a large number of similar documents are detected, and it is not preferable to present the results as they are and select them. For this reason, in the present embodiment, the tracking server 122 or the tracking PC 121 requests the content analysis server 102 to detect similar documents each time the tracking server 122 performs an input / output operation on the terminal device. It is preferable to request the content analysis server 102 to detect similar documents.

  In this case, the tracking server 122 is configured to analyze the operation information based on the detection result obtained from the content analysis server 102 and generate distribution information indicating the distribution route of the corresponding document.

  By configuring in this way, similar documents included in the same distribution route (the same tree) can be handled as one set, so that options presented to the user can be reduced. Specifically, the tracking server 122 may present the most upstream document as a candidate among the target documents included in the same distribution route.

  As described above, the document tracking system according to the second exemplary embodiment of the present invention extracts a document whose content is similar to the document to be tracked from a document to which other identification information is assigned, and extracts the extracted document. Since the input / output history is tracked, it is possible to track a document for which identification information cannot be obtained or a document to which identification information not registered is assigned.

1 is a block diagram showing a document tracking system as a first embodiment of the present invention. FIG. It is a functional block diagram of the file server and content analysis server which comprise the document tracking system as the 1st Embodiment of this invention. It is an image which shows the example of the tracking result displayed on the tracking scanner or tracking PC which comprises the document tracking system as the 1st Embodiment of this invention. It is a flowchart which shows the tracking operation | movement of the document tracking system as the 1st Embodiment of this invention. It is a block diagram which shows the document tracking system as the 2nd Embodiment of this invention. 1 is a functional block diagram of a multifunction peripheral, a tracking server, and a content analysis server that constitute a document tracking system according to a first embodiment of the present invention. FIG.

Explanation of symbols

1, 101 File server 2, 102 Content analysis server 10, 110 Client PC
11, 111 Printer 12, 13, 112, 113 Multifunction device 14, 114 Scanner 20, 120 Tracking scanner 21, 121 Tracking PC
22, 122 Tracking server 40 Monitoring folder 50 Document monitoring unit 51 Monitoring folder setting unit 52 Document storage monitoring unit 53 Document registration request unit 60, 170 Document registration unit 61, 171 Document registration processing unit 62, 172 Document piece division unit 63, 173 Feature amount table registration unit 64, 174 Feature amount table storage unit 141 Scan unit 142 Printing unit 143 Operation information collection unit 151 Image reading unit 152, 156 Paper pattern detection unit 155 Image drawing unit 161 Operation table storage unit 162 Operation table registration unit

Claims (17)

In a document tracking system that tracks input / output operations on a document,
A file server for storing the document;
A feature quantity table storage device that prestores a feature quantity table in which registered document identification information for identifying the document is associated with a feature quantity acquired from the content of the document stored in the file server;
Each time an input / output operation is performed on the document, at least one terminal device that acquires distribution document identification information for identifying the document;
An operation table storage device for storing an operation table in which operation information representing an input / output operation by the terminal device is associated with the circulation document identification information;
A tracking target document designating device for specifying a tracking target document;
The feature amount is acquired from the content of the document specified in the tracking target document specifying device, and the acquired feature amount is compared with the feature amount included in the feature amount table. A document identification information detection device for detecting registered document identification information of similar documents;
Operation information representing an input / output operation for a document identified by the registered document identification information detected by the document identification information detection device is extracted from the operation table, and an input / output history for the document is extracted based on the extracted operation information. A document tracking system comprising: a tracking processing device that performs a tracking process for tracking a document. The tracking target document specifying device acquires the distribution document identification information from the tracking target document,
The tracking processing device extracts operation information representing an input / output operation for a document identified by the distribution document identification information acquired by the tracking target document designating device from the operation table, and based on the extracted operation information, Performs tracking processing to track the input / output history from documents stored in the file server,
The document identification information detection apparatus detects registered document identification information of a document whose content is similar to the document to be tracked only when the result of the tracking process is not obtained. Document tracking system described. A document monitoring device for monitoring a document stored in a specific location of the file server;
3. The document tracking system according to claim 1, wherein the document monitoring apparatus causes the feature quantity table storage device to update the feature quantity table when detecting a change in a state of the document. 4. . In a document tracking system that tracks input / output operations on a document,
Each time an input / output operation is performed on the document, at least one terminal device that acquires distribution document identification information for identifying the document;
A feature amount table storage device for storing a feature amount table in which the circulation document identification information is associated with a feature amount acquired from the content of the document;
An operation table storage device for storing an operation table in which operation information representing an input / output operation by the terminal device is associated with the circulation document identification information;
A tracking target document designating device for specifying a tracking target document;
The feature amount is acquired from the content of the document specified in the tracking target document specifying device, and the acquired feature amount is compared with the feature amount included in the feature amount table. A document identification information detection device for detecting distribution document identification information of similar documents;
Operation information representing an input / output operation for a document identified by the distribution document identification information detected by the document identification information detection device is extracted from the operation table, and an input / output history for the document is extracted based on the extracted operation information. A document tracking system comprising: a tracking processing device that performs a tracking process for tracking a document. The tracking target document specifying device acquires the distribution document identification information from the tracking target document,
The tracking processing device extracts operation information representing an input / output operation for a document acquired by the tracking target document specifying device and identified by the distribution document identification information from the operation table, and based on the extracted operation information, the distribution processing Perform tracking processing to track the input / output history of the document identified by the document identification information,
5. The document identification information detection apparatus detects distribution document identification information of a document whose content is similar to the document to be tracked only when the result of the tracking process is not obtained. Document tracking system described.   When a plurality of results are obtained by the tracking process, the tracking processing device outputs the plurality of results to the tracking target document specifying device, and selects one result for the user of the tracking target document specifying device. The document tracking system according to any one of claims 1 to 5, wherein   7. The document tracking system according to claim 1, wherein the feature amount table storage device acquires a document piece obtained by fragmenting the document as a feature amount of the document.   The document tracking system according to any one of claims 1 to 7, wherein the tracking target document designating device is configured by a scanner that reads the tracking target document.   8. The document tracking system according to claim 1, wherein the tracking target document specifying device specifies a file name of the tracking target document.   10. The document tracking system according to claim 1, wherein the distribution document identification information is recording medium identification information for identifying a recording medium on which the content of the document is recorded.   The document tracking system according to claim 10, wherein the recording medium identification information is information based on a concavo-convex pattern on a surface of a sheet as the recording medium.   11. The document tracking system according to claim 10, wherein the recording medium identification information is information based on a pattern of metal fibers randomly inserted in a sheet as the recording medium.   11. The document tracking system according to claim 10, wherein the recording medium identification information is information based on an identifier recorded on an IC chip embedded in a sheet as the recording medium.   The document tracking system according to claim 1, further comprising a tracking result output device that outputs a result of the tracking process.   The document tracking system according to claim 1, wherein the operation information includes user identification information for identifying a user who has performed an input / output operation represented by the operation information. . In a document tracking method for causing a computer to track input / output operations for documents stored in a file server,
A feature amount table storing step for storing in advance a feature amount table in which registered document identification information for identifying the document is associated with the feature amount acquired from the content of the document stored in the file server;
An identification information acquisition step of acquiring distribution document identification information for identifying the document each time an input / output operation is performed on the document;
An operation table storing step for storing an operation table in which operation information representing the input / output operation is associated with the distribution document identification information;
A tracked document specifying step in which a tracked document is specified;
The feature amount is acquired from the content of the document specified in the tracking target document specification step, and the acquired feature amount is compared with the feature amount included in the feature amount table. A document identification information detecting step for detecting registered document identification information of a similar document;
Operation information representing an input / output operation for the document identified by the registered document identification information detected in the document identification information detection step is extracted from the operation table, and an input / output history for the document is extracted based on the extracted operation information. And a tracking process step for tracking the document. In a document tracking method for causing a computer to track input / output operations on a document,
An identification information acquisition step of acquiring distribution document identification information for identifying the document each time an input / output operation is performed on the document;
A feature table storing step for storing a feature table in which the circulation document identification information is associated with a feature acquired from the content of the document;
An operation table storing step for storing an operation table in which operation information representing the input / output operation is associated with the distribution document identification information;
A tracked document specifying step in which a tracked document is specified;
The feature amount is acquired from the content of the document specified in the tracking target document specification step, and the acquired feature amount is compared with the feature amount included in the feature amount table. A document identification information detecting step for detecting distribution document identification information of similar documents;
The operation information representing the input / output operation for the document identified by the distribution document identification information detected in the document identification information detection step is extracted from the operation table, and the input / output history for the document is extracted based on the extracted operation information. And a tracking step for tracking the document.