JP2007249864A - Document security detecting method, document security detecting device and document security detection program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a document security detecting method which reduces the burden on a user and can detect a proper security level, a document security detecting device and document security detection program. <P>SOLUTION: The document security detecting method for detecting the security level of a document to be registered comprises a retrieving step S1 to S10 for reading key information from a key information DB in which security levels are associated with key information and retrieving key information included in the document, and a detecting step S11 for detecting the security level of the document from the key information DB on the basis of the key information included in the document, wherein the key information includes a key image to thereby solve the above problem. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a document security detection method, a document security detection apparatus, and a document security detection program, and more particularly to a document security detection method, a document security detection apparatus, and a document security detection program for detecting a security level of a document to be registered.

  With the development of network technology in recent years, in a system in which a document management server and a plurality of clients are connected via a network, it is often performed to register and manage documents in the document management server. Since the document management server is accessed from a plurality of clients, security measures for registered documents are required.

  For example, a document shared by a group needs to be managed so as to allow access from users belonging to the group. Further, it is necessary to manage a document used by an individual so as to allow access only from a user who registered the document.

In a conventional document management server, when a user registers a document from a client, a range in which access to the document is permitted is specified by, for example, a security level (see, for example, Patent Document 1).
JP 2002-288161 A

  However, in the conventional document management server, when a user registers a document from a client, the confidentiality of the document is judged, and a range in which access to the document is permitted is specified by, for example, a security level. There is a problem that there is a risk that the user may designate an inappropriate security level.

  In recent years, due to the enforcement of the Personal Information Protection Law and the like, handling of documents has to be done with more care, so a mechanism has been required so that users who register documents do not specify inappropriate security levels.

  The present invention has been made in view of the above points, and provides a document security detection method, a document security detection apparatus, and a document security detection program that can reduce the burden on the user and detect an appropriate security level. Objective.

  In order to solve the above problems, the present invention provides a document security detection method for detecting a security level of a document to be registered, and reads the key information from a key information database in which the security level and key information are associated with each other. A search step for searching for the key information included in the document; and a detection step for detecting a security level of the document from the key information database based on the key information included in the document. Includes a key image.

  The document security detection method performs a process based on a selected step of selecting an operation corresponding to the security level of the document based on an operation database in which a security level and an operation are associated with each other. And a processing step.

  Further, the document security detection method includes a selection step of selecting a security means corresponding to a security level of the document based on an operation database in which a security level and a security means are associated, and the selected security means is The method may further include a setting step for setting the document.

  The retrieval step may retrieve the key image included in the document by using an image feature amount including one or more of color tone, color distribution, contour line or pattern.

  The key information includes a keyword, and the searching step includes a document text conversion step for converting the document into text, and a keyword search for reading the keyword from the key information database and searching for the keyword included in the text document. The method may further include a step.

  The document may be image data, application data, text data, or markup language data.

  In addition, what applied the component, expression, or arbitrary combination of the component of this invention to a method, an apparatus, a system, a computer program, a recording medium, a data structure, etc. is also effective as an aspect of this invention.

  According to the present invention, it is possible to provide a document security detection method, a document security detection apparatus, and a document security detection program that can reduce the burden on the user and detect an appropriate security level.

  Next, the best mode for carrying out the present invention will be described based on the following embodiments with reference to the drawings. In this embodiment, a document management server that detects a security level when registering a document will be described as an example of a document security detection device. However, any device that detects the security level of a document to be registered may be used. Also good.

  FIG. 1 is a block diagram of an example of a system including a document management server according to the present invention. In the system 1 of FIG. 1, a document management server 10, a client 11, and a multifunction peripheral (MFP) 12 are connected via a network 13 such as a LAN.

  The multifunction machine 12 is an example of an apparatus that supplies image data, which is an example of a document, to the client 11. The client 11 is a computer terminal used by a user, and registers a document in the document management server 10 and accesses a document registered in the document management server 10 based on a user operation.

  The document management server 10 detects the security level of the document registered from the client 11, and performs processing or security setting corresponding to the security level as described later. The document management server 10 manages the registered document and controls access from the user according to the security level of the document.

  In the system 1 of FIG. 1, the document management server 10 and the multifunction device 12 are provided as separate devices, but the document management server 10 and the multifunction device 12 may be provided as a single device.

  FIG. 2 is a block diagram of another example of a system including a document management server according to the present invention. In the system 2 in FIG. 2, a client 11 and an MFP 12 are connected via a network 13. The system 2 is different from the system 1 of FIG. 1 in that the document management server 10 is provided inside the MFP 12. However, the roles of the document management server 10, the client 11, and the multifunction machine 12 are the same in the system 1 and the system 2. Therefore, the following description is directed to the system 1 of FIG.

  FIG. 3 is a configuration diagram of an example of a document management server. The document management server 10 in FIG. 3 includes an input device 31, an output device 32, a drive device 33, an auxiliary storage device 34, a memory device 35, an arithmetic processing device 36, and an interface device 37 that are mutually connected by a bus B. Is done.

  The input device 31 includes a keyboard and a mouse, and is used for inputting various signals. The output device 32 includes a display device and is used to display various windows, data, and the like. The interface device 37 includes a modem, a LAN card, and the like, and is used for connecting to the network 13.

  The document security detection program of the present invention is at least a part of various programs that control the document management server 10. The document security detection program is provided by, for example, distribution of the recording medium 38 or downloading from the network 13.

  The recording medium 38 on which the document security extraction program is recorded is a CD-ROM, a flexible disk, a magneto-optical disk, or the like, a recording medium that records information optically, electrically, or magnetically, a ROM, a flash memory, or the like. Various types of recording media such as a semiconductor memory for electrically recording information can be used.

  When the recording medium 38 on which the document security detection program is recorded is set in the drive device 33, the document security detection program is installed from the recording medium 38 to the auxiliary storage device 34 via the drive device 33. The document security detection program downloaded from the network 13 is installed in the auxiliary storage device 34 via the interface device 37.

  The document management server 10 stores the installed document security detection program and also stores necessary files, data, and the like. The memory device 35 reads and stores the document security detection program from the auxiliary storage device 34 at the time of activation. The arithmetic processing unit 36 implements various processes and functions as will be described later in accordance with the document security detection program stored in the memory device 35.

  FIG. 4 is a processing block diagram of a system including a document management server according to the present invention. The system 1 including the document management server 10 functions as a UI / data input unit 41, an image data supply unit 42, a document registration control unit 43, a DB control unit 44, a conversion unit 45, and a corresponding operation processing unit 46. For example, the image data supply unit 42 is realized by the multifunction machine 12. The UI / data input unit 41 is realized by the client 11. Further, the document registration control unit 43, the DB control unit 44, the conversion unit 45, and the corresponding operation processing unit 46 are realized by the document management server 10.

  The image data supply unit 42 supplies image data generated by a FAX function, a scanner function, or the like to the UI / data input unit 41. The UI / data input unit 41 realizes a user input function, a security level selection / input function, a security level / operation correspondence setting function, a key input function, a document input function, and the like. The key input function corresponds to a keyword and a key image.

  The document registration control unit 43 performs a function corresponding to the security level set for the corresponding keyword on the text document in which the keyword is found as a result of search and the correspondence setting function between the key (keyword or key image) and the security level. As a result of the function and search, a function for performing an operation corresponding to the security level set for the key image is realized for the image data in which the key image is found.

  The DB control unit 44 controls a security level DB, a keyword DB, a key image DB, an operation DB, a document DB, a text document DB, and the like. The conversion unit 45 realizes a document text conversion function, a function of searching a keyword registered in the keyword DB from a text document, a function of searching a key image registered in the key image DB from image data, and the like.

  The corresponding operation processing unit 46 performs processing corresponding to the security level of the document (for example, sending an e-mail or sounding a buzzer) or security setting (for example, encryption, prohibition of printing, creation of stamped data).

  The details of the processing block diagram shown in FIG. 4 will be described separately for the initial setting process and the document registration process.

(Initial setting process)
FIG. 5 is an explanatory diagram of an example of processing for registering a security level. FIG. 6 is an image diagram of an example of a security level setting screen realized by the security level selection / input function.

  The security level setting screen 60 is configured to include an edit box 61, a registration button 62, and a registered security level list 63. The user uses the user input function 51 to input a security level into the edit box 61 and presses the registration button 62. When the registration button 62 is pressed, the security level selection / input function 52 adds the security level input to the edit box 61 to the registered security level list 63 and displays it in the security level DB 53.

  FIG. 7 is an explanatory diagram of an example of processing for registering a keyword and setting the correspondence between the keyword and the security level. FIG. 8 is an image diagram of an example of a keyword registration screen realized by the key input function. FIG. 9 is an image diagram of an example of a key / security level correspondence setting screen realized by a key / security level correspondence setting function.

  The keyword registration screen 80 is configured to include an edit box 81, a registration button 82, and a registered keyword list 83. The user uses the user input function 51 to input a keyword in the edit box 81 and presses the registration button 82. When the registration button 82 is pressed by the user, the keyword input function 71 realized by the key input function adds and displays the keyword input to the edit box 81 to the registered keyword list 83 and registers it in the keyword DB 73.

  The key / security level correspondence setting screen 90 includes a security level selection box 91, a key list 92, a setting key list 93, an add button 94, and a delete button 95. The key / security level correspondence setting function 72 refers to the security level DB 53 and the keyword DB 73 to generate a key / security level correspondence setting screen 90.

  The user uses the user input function 51 to select a security level from the security level selection box 91. Further, the user uses the user input function 51 to select a keyword to be set in correspondence with the security level selected in the security level selection box 91 from the key list 92 and presses the add button 94.

  When the user presses the add button 94, the keyword / security level correspondence setting function 72 realized by the key / security level correspondence setting function adds the keyword selected from the key list 92 to the setting key list 93. And is registered in the keyword DB 74 in association with the security level selected from the security level selection box 91. The user can cancel the correspondence between the keyword and the security level by selecting the keyword from the setting key list 93 and pressing the delete button 95.

  FIG. 10 is an explanatory diagram of an example of processing for registering a key image and setting the correspondence between the key image and the security level. FIG. 11 is an image diagram of an example of a key image registration screen realized by a key input function. FIG. 12 is an image diagram of another example of the key image registration screen realized by the key input function.

  The key image registration screen 110 of FIG. 11 is configured to include an edit box 111, a reference button 112, and a registered key image list 113. The user uses the user input function 51 to input the file name of the key image in the edit box 111 or select the file name displayed by pressing the reference button 112.

  Also, the key image registration screen 120 in FIG. 12 is configured to include an edit box 121, a reference button 122, and a registered key image list 123. The user uses the user input function 51 to input the file name of the key image into the edit box 121 or select the file name displayed by pressing the reference button 122.

  When the file name is selected by the user, the key image input function 100 realized by the key input function adds the file name of the key image input to the edit box 111 to the registered key image list 113 and displays it. Register in the image DB 102. Also, the key image input function 100 realized by the key input function adds the thumbnail of the key image input to the edit box 121 to the registered key image list 123 for display, and registers it in the key image DB 102.

  The key image / security level correspondence setting function 101 refers to the security level DB 53 and the key image DB 102 to generate the key / security level correspondence setting screen 90 described above.

  The user uses the user input function 51 to select a security level from the security level selection box 91. Further, the user uses the user input function 51 to select a key image to be set in correspondence with the security level selected in the security level selection box 91 from the key list 92 and presses the add button 94.

  When the add button 94 is pressed by the user, the key image / security level correspondence setting function 101 realized by the key / security level correspondence setting function sets the key image selected from the key list 92 to the setting key list 93. And is registered in the key image DB 103 in association with the security level selected from the security level selection box 91. The user can cancel the correspondence between the key image and the security level by selecting the key image from the setting key list 93 and pressing the delete button 95.

  FIG. 13 is an explanatory diagram of an example of processing for setting the correspondence between the security level and the operation. FIG. 14 is an image diagram of an example of a security level / operation correspondence setting screen realized by a security level / operation correspondence setting function.

  The security level / action correspondence setting screen 140 is configured to include a security level selection box 141, an action list 142, a setting action list 143, an add button 144, and a delete button 145. The security level / operation correspondence setting function 131 refers to the security level DB 53 and the operation DB 132 to generate a security level / operation correspondence setting screen 140. The operation DB 132 is a default, and operations such as mail transmission, encryption, prohibition of printing, sounding a buzzer, creation of stamped data (imaging), and the like are registered.

  The user uses the user input function 51 to select a security level from the security level selection box 141. Further, the user uses the user input function 51 to select an operation to be set in correspondence with the security level selected in the security level selection box 141 from the operation list 142 and presses the add button 144.

When the add button 144 is pressed by the user, the security level / action correspondence setting function 131 adds the action selected from the action list 142 to the setting action list 143 and displays the selected action from the security level selection box 141. The corresponding security level is registered in the operation DB 133. The user can cancel the correspondence between the operation and the security level by selecting an operation from the set operation list 143 and pressing the delete button 145.
(Document registration process)
FIG. 15 is a PAD diagram showing an example of processing for detecting the security level of a document to be registered and performing an operation corresponding to the security level. In step S 1, a document such as image data or application data is input to the UI / data input unit 41.

  The document registration control unit 43 selects one of steps S2 to S4, steps S5 to S7, and steps S8 to 10 according to the type of the input document. For example, if the input document is image data and text can be extracted, the document registration control unit 43 selects steps S2 to S4.

  If the input document is not image data and text extractable, the document registration control unit 43 selects steps S5 to S7. If the input document is application data, the document registration control unit 43 selects steps S8 to S10.

  If the input document is image data and text can be extracted, the document registration control unit 43 instructs the conversion unit 45 to perform the processes in steps S2 to S4. In step S2, the conversion unit 45 extracts a text document from the image data by executing OCR. In step S3, the conversion unit 45 searches the text document for keywords registered in the keyword DB 74. In step S4, the conversion unit 45 returns the searched keyword to the document registration control unit 43.

  If the input document is not image data and text extractable, the document registration control unit 43 instructs the conversion unit 45 to perform the processes in steps S5 to S7. In step S5, the conversion unit 45 extracts an image feature amount from the image data. In step S6, the conversion unit 45 searches the image data for a key image registered in the key image DB 103 based on the extracted image feature amount. In step S 7, the conversion unit 45 returns the searched key image to the document registration control unit 43.

  If the input document is application data, the document registration control unit 43 instructs the conversion unit 45 to perform the processes in steps S8 to S10. In step S8, the conversion unit 45 extracts a text document from the application data. In step S9, the conversion unit 45 searches the text document for a keyword registered in the keyword DB 74. In step S 10, the conversion unit 45 returns the searched keyword to the document registration control unit 43.

  When a keyword or key image is returned from the conversion unit 45 in step S4, S7 or S10, the document registration control unit 43 proceeds to step S11 and is returned from the conversion unit 45 with reference to the keyword DB 74 or key image DB 103. A security level corresponding to a keyword or key image is detected.

  In step S12, the document registration control unit 43 refers to the operation DB 133 and selects a notification (for example, warning sound, mail, light emission, etc.) to the administrator that is an operation corresponding to the security level. Then, the document registration control unit 43 instructs the corresponding operation processing unit 46 to notify the selected administrator. Therefore, the corresponding operation processing unit 46 can notify the administrator of the operation corresponding to the security level.

  FIG. 16 is an explanatory diagram of an example of processing for detecting the security level of a text extractable document and performing an operation corresponding to the security level. When a user inputs a text extractable document, the document input function 51 of the UI / data input unit 41 stores the text extractable document in the document DB 164 (for example, image data or text document from which a text document can be extracted by OCR execution). Application data such as a word processor that can be extracted, text data, markup language data such as HTML or XML, etc.) are registered.

  The document text conversion function 161 of the conversion unit 45 refers to the document DB 164, converts the registered text extractable text into text, and registers it as a text document in the text document DB 165. The function 162 for searching the keyword registered in the keyword DB of the conversion unit 45 from the text document refers to the keyword DB 74 and the text document DB 165 to search the keyword registered in the keyword DB 74 from the text document.

  As a result of the search, the function 163 that performs an operation corresponding to the security level set for the keyword for the text document in which the keyword is found detects from the keyword DB 74 the security level corresponding to the keyword searched from the text document. .

  A function 163 that performs an operation corresponding to the security level set for the keyword for a text document in which the keyword is found as a result of the search selects an operation corresponding to the detected security level based on the operation DB 133.

  Then, the function 163 that performs the operation corresponding to the security level set for the keyword for the text document in which the keyword is found as a result of the search instructs the corresponding operation processing unit 46 to execute the selected operation.

  FIG. 17 is a sequence diagram illustrating an example of processing for detecting a security level of a text extractable document and performing an operation corresponding to the security level. In step S 21, the image data supply unit 42 supplies FAX / scanner data as an example of image data generated by the FAX function, the scanner function, or the like to the UI / data input unit 41.

  In step S 22, the UI / data input unit 41 supplies input data such as FAX / scanner data, application / image data, XML / HTML data to the document registration control unit 43.

  In step S23, the document registration control unit 43 uses the DB control unit 44 to register input data in the document DB 164. In step S 24, the document registration control unit 43 transmits a document text conversion command / keyword search command to the conversion unit 45. In step S25, the conversion unit 45 extracts a text document from the input data, and searches the text document for a keyword registered in the keyword DB 74. In step S 26, the conversion unit 45 returns the searched keyword to the document registration control unit 43.

  In step S27, the document registration control unit 43 uses the DB control unit 44 and refers to the keyword DB 74 to detect the security level corresponding to the keyword returned from the conversion unit 45. Further, the document registration control unit 43 uses the DB control unit 44 and refers to the operation DB 133 to select a notification (warning sound, mail, light emission, etc.) to the administrator that is an operation corresponding to the security level. Then, the document registration control unit 43 proceeds to step S28, and transmits a notification command corresponding to the selected notification to the corresponding operation processing unit 46. Therefore, the corresponding operation processing unit 46 can notify the administrator according to the notification command.

  FIG. 18 is an explanatory diagram showing an example of processing for detecting the security level of a document from which text extraction is not possible and performing an operation corresponding to the security level. When the user inputs a document that cannot be text-extracted, the document input function 51 of the UI / data input unit 41 registers the document that cannot be text-extracted in the document DB 164.

The function 181 for searching the key image registered in the key image DB of the conversion unit 45 from the image data searches the key image registered in the key image DB 103 from the image data with reference to the key image DB 103 and the document DB 164. To do. A function 181 for searching for a key image registered in the key image DB from image data is a similar method for searching for a similar image using an image feature amount including one or more of color tone, color distribution, contour line or pattern. Image search technology (http://www.neurosci.aist.go.jp/~kurita/thesis/thesis/node157.html or http://sd.is.uec.ac.jp/research/intro/cbir/fractal /reference)
Can be used.

  As a result of the search, a function 182 that performs an operation corresponding to the security level set in the corresponding key image with respect to the image data in which the key image is found is a security level corresponding to the key image searched from the image data. Detect from DB103.

  The function 182 that performs an operation corresponding to the security level set in the key image on the image data in which the key image is found as a result of the search selects an operation corresponding to the detected security level based on the operation DB 133. To do.

  Then, the function 182 that performs an operation corresponding to the security level set in the corresponding key image for the image data in which the key image is found as a result of the search instructs the corresponding operation processing unit 46 to execute the selected operation. .

  FIG. 19 is a sequence diagram illustrating an example of processing for detecting a security level of a document from which text extraction is not possible and performing an operation corresponding to the security level.

  In step S 31, the image data supply unit 42 supplies FAX / scanner data as an example of image data generated by the FAX function, the scanner function, or the like to the UI / data input unit 41. In step S 32, the UI / data input unit 41 supplies input data such as FAX / scanner data and image data to the document registration control unit 43.

  In step S33, the document registration control unit 43 uses the DB control unit 44 to register input data in the document DB 164. In step S 34, the document registration control unit 43 transmits an image feature amount extraction command / pattern search command to the conversion unit 45. In step S35, the conversion unit 45 searches the image data for a key image registered in the key image DB 103. In step S 36, the conversion unit 45 returns the key image retrieved from the image data (partial image of the input image, type of person's face, machine, landscape, etc.) to the document registration control unit 43.

  In step S37, the document registration control unit 43 uses the DB control unit 44 to refer to the key image DB 103 and detect the security level corresponding to the key image returned from the conversion unit 45. Further, the document registration control unit 43 uses the DB control unit 44 and refers to the operation DB 133 to select a notification (warning sound, mail, light emission, etc.) to the administrator that is an operation corresponding to the security level. Then, the document registration control unit 43 proceeds to step S38, and transmits a notification command corresponding to the selected notification to the corresponding operation processing unit 46. Therefore, the corresponding operation processing unit 46 can notify the administrator according to the notification command.

(Initial setting process)
Since the initial setting process of the second embodiment is the same as the initial setting process of the first embodiment described above, the description thereof is omitted.
(Document registration process)
FIG. 20 is a PAD diagram showing an example of processing for detecting the security level of a document to be registered and setting the security corresponding to the security level in the document. In addition, the process of step S41-S51 is the same as the process of step S1-S11 of FIG. 15, and description is abbreviate | omitted.

  In step S52, the document registration control unit 43 refers to the operation DB 133, and selects security (for example, password, print restriction, copy restriction, electronic trail addition, distribution, etc.) corresponding to the security level. Then, the document registration control unit 43 instructs the corresponding operation processing unit 46 to set the selected security. Therefore, the corresponding operation processing unit 46 can set security corresponding to the security level in the document.

  FIG. 21 is a sequence diagram illustrating an example of processing for detecting a security level of a text extractable document and setting security corresponding to the security level in the document. In addition, the process of step S61-S66 is the same as the process of step S21-S26 of FIG. 17, and description is abbreviate | omitted.

  In step S67, the document registration control unit 43 uses the DB control unit 44 and refers to the keyword DB 74 to detect a security level corresponding to the keyword returned from the conversion unit 45. In addition, the document registration control unit 43 uses the DB control unit 44 and refers to the operation DB 133 to select security corresponding to the security level. Then, the document registration control unit 43 proceeds to step S68, and instructs the corresponding operation processing unit 46 to set the selected security. Therefore, the corresponding operation processing unit 46 can set security corresponding to the security level in the document.

  FIG. 22 is a sequence diagram illustrating an example of processing for detecting a security level of a document from which text extraction is not possible and performing an operation corresponding to the security level. In addition, the process of step S71-S76 is the same as the process of step S31-S36 of FIG. 19, and it abbreviate | omits description.

  In step S77, the document registration control unit 43 uses the DB control unit 44 and refers to the key image DB 103 to detect a security level corresponding to the key image returned from the conversion unit 45. In addition, the document registration control unit 43 uses the DB control unit 44 and refers to the operation DB 133 to select security corresponding to the security level. Then, the document registration control unit 43 proceeds to step S78, and instructs the corresponding operation processing unit 46 to set the selected security. Therefore, the corresponding operation processing unit 46 can set security corresponding to the security level in the document.

  The present invention is not limited to the specifically disclosed embodiments, and various modifications and changes can be made without departing from the scope of the claims.

It is a block diagram of an example of the system containing the document management server by this invention. It is a block diagram of the other example of the system containing the document management server by this invention. It is a block diagram of an example of a document management server. It is a processing block diagram of a system including a document management server according to the present invention. It is explanatory drawing of an example of the process which registers a security level. It is an image figure of an example of the security level setting screen implement | achieved by a security level selection / input function. It is explanatory drawing of an example of the process which registers a keyword and sets a response | compatibility with a keyword and a security level. It is an image figure of an example of the keyword registration screen implement | achieved by the key input function. It is an image figure of an example of the corresponding | compatible setting screen of the key and security level implement | achieved by the corresponding | compatible setting function of a key and a security level. It is explanatory drawing of an example of the process which registers a key image and sets a response | compatibility with a key image and a security level. It is an image figure of an example of the key image registration screen implement | achieved by the key input function. It is an image figure of the other example of the key image registration screen implement | achieved by the key input function. It is explanatory drawing of an example of the process which sets the response | compatibility with a security level and operation | movement. It is an image figure of an example of a security level and operation | movement corresponding | compatible setting screen implement | achieved by the correspondence setting function of a security level and operation | movement. It is a PAD diagram of an example of processing for detecting a security level of a document to be registered and performing an operation corresponding to the security level. It is explanatory drawing of an example of the process which detects the security level of the document which can extract a text, and performs the operation | movement corresponding to a security level. It is a sequence diagram of an example of processing for detecting a security level of a text extractable document and performing an operation corresponding to the security level. It is explanatory drawing of an example of the process which detects the security level of the document which cannot extract a text, and performs the operation | movement corresponding to a security level. FIG. 10 is a sequence diagram illustrating an example of processing for detecting a security level of a document from which text extraction is not possible and performing an operation corresponding to the security level. FIG. 10 is a PAD diagram illustrating an example of processing for detecting a security level of a document to be registered and setting security corresponding to the security level in the document. It is a sequence diagram of an example of processing for detecting a security level of a text extractable document and setting security corresponding to the security level in the document. FIG. 10 is a sequence diagram illustrating an example of processing for detecting a security level of a document from which text extraction is not possible and performing an operation corresponding to the security level.

Explanation of symbols

1, 2 system 10 document management server 11 client 12 MFP (MFP)
13 Network 31 Input Device 32 Output Device 33 Drive Device 34 Auxiliary Storage Device 35 Memory Device 36 Arithmetic Processing Device 37 Interface Device 38 Recording Medium 41 UI / Data Input Unit 42 Image Data Supply Unit 43 Document Registration Control Unit 44 DB Control Unit 45 Conversion Unit 46 Corresponding operation processing unit 51 User input function 52 Security level selection / input function 53 Security level DB
71 Keyword input function 72 Keyword and security level correspondence setting function 73, 74 Keyword DB
100 Key image input function 101 Key image and security level correspondence setting function 102, 103 Key image DB
131 Security level and action correspondence setting function 132, 133 action DB
161 Document text conversion function 162 Function for searching a keyword registered in the keyword DB from a text document 163 As a result of search, an operation corresponding to the security level set for the corresponding keyword is performed on the text document found. Function 164 Document DB
165 Text document DB
181 Function for searching key image registered in key image DB from image data 182 Function for performing operation corresponding to security level set for corresponding key image for image data in which key image is found as result of search

Claims (8)

A document security detection method for detecting a security level of a document to be registered,
A search step of reading the key information from a key information database in which a security level and key information are associated, and searching for the key information included in the document;
Detecting a security level of the document from the key information database based on the key information included in the document,
The document security detection method, wherein the key information includes a key image. A selection step of selecting an operation corresponding to the security level of the document based on an operation database in which a security level and an operation are associated;
The document security detection method according to claim 1, further comprising a processing step of performing processing based on the selected operation. A selection step of selecting a security means corresponding to the security level of the document based on an operation database in which a security level and a security means are associated;
The document security detection method according to claim 1, further comprising a setting step of setting the selected security means in the document.   2. The search step according to claim 1, wherein the key image included in the document is searched using an image feature amount including at least one of a color shade, a color distribution, a contour line, and a pattern. 4. The document security detection method according to any one of items 3. The key information includes a keyword,
The search step includes a document text conversion step for converting the document into text,
5. The document security detection method according to claim 1, further comprising a keyword search step of reading out the keyword from the key information database and searching for the keyword included in a text document. 6.   6. The document security detection method according to claim 1, wherein the document is image data, application data, text data, or markup language data. A document security detection device for detecting a security level of a document to be registered,
Retrieval means for retrieving the key information from a key information database in which a security level and key information are associated, and retrieving the key information included in the document;
Detecting means for detecting a security level of the document from the key information database based on the key information included in the document;
The document security detection apparatus, wherein the key information includes a key image. A document security detection program executed in a document security detection device for detecting a security level of a document to be registered,
In the document security detection device,
A retrieval step of retrieving the key information from a key information database in which a security level and key information including a key image are associated, and retrieving the key information included in the document;
A document security detection program that executes a detection step of detecting a security level of the document from the key information database based on the key information included in the document.

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