JP2011232984A - Document data editing apparatus, document data editing method and information medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent unauthorized copy of document data on a document data editing apparatus for displaying document data and copying and managing part of the data on another display area by user's operation.SOLUTION: When part of document data is copied and managed on another display area by user's operation, a document data editing apparatus manages only area information of the part of document data selected by the user's operation. The document data editing apparatus and document data editing method are provided in which unauthorized copy of the document data such as copy of the document data itself can be prevented by specifying and displaying the area of the document data from the area information when the area selected by the user is displayed.

Description

  The present invention relates to a document data editing apparatus, a document data editing method, and a portable information recording medium having an input function for allowing a user to edit document data.

  It is possible to view so-called electronic book data (hereinafter referred to as document data) obtained by digitizing data such as paperbacks, books, comics, newspapers, magazines, etc. with various mobile information processing devices such as personal computers, mobile phone terminals, and smartphones. It can be done. Furthermore, there are many terminals called electronic papers called electronic papers that do not consume power during display and are equipped with devices with high visibility, specialized for browsing document data. . These devices can be read in the same way as reading document data that has traditionally been printed on paper, but they store several volumes of document data, are lighter than paper books, The document data can be obtained anytime, anywhere via the communication network.

  On the other hand, in newspapers and magazines as a type of document data printed on paper, while reading, or after reading them once, only favorite articles and important articles are cut out and collected separately. In many cases, such as so-called scrapping, personal partial document data is collected. When such an operation for creating a scrap of document data is performed on various information processing apparatuses displaying document data as digital data, the user's favorite is selected from the document data displayed on a display or the like. A method may be considered in which this part is copied and held as separate data. However, if such a method is simply realized as a function in a terminal, illegal duplication of document data including copyright will be facilitated. For this reason, there is a method in which document data is encrypted and stored so that document data displayed on a display or the like cannot be copied.

  For example, the following method is disclosed as a method for restricting illegal duplication of document data. Patent Document 1 discloses an apparatus, method, and system that replaces specific characters (words) with encrypted information in accordance with a predetermined regular expression rule list for data in document data so that the user cannot view the data. ing. Patent Document 2 discloses a system that authenticates with a server as a kind of method for managing unauthorized duplication of document data by digital rights management called various DRM (Digital Rights Management).

JP 2009-75722 A International Publication No. 98/27494

  Although both Patent Document 1 and Patent Document 2 describe a method for restricting browsing of document data and a method for preventing unauthorized copying of data, an operation for creating a scrap of document data as described above. It does not describe the configuration when performing the above.

  Accordingly, in the present invention, in view of the above problems, in a device having a document data display function, a part of document data displayed by a user operation can be cut out and managed separately while preventing unauthorized duplication of the document data. An object of the present invention is to provide a document data editing apparatus and a document data editing method for realizing such an editing operation.

  The document data editing apparatus according to the present application includes an input unit that receives a user operation input for document data, a document data cutout unit that generates information for specifying a part of the area specified by the input unit, and document data A data encryption key for encrypting the data, encrypted data obtained by encrypting the document data with the data encryption key, and an information recording unit storing information for specifying an area generated by the document cutout unit.

  In the document data editing apparatus, the information recording unit may further store thumbnail data obtained by reducing the resolution of a display image of a specified area of the document data.

  In the document data editing apparatus, the information recording unit may further store cut-out area stroke information having a plurality of pieces of stroke information for specifying a specified partial area of the document data.

  In the document data editing apparatus, the partial area of the document data may be an area that is displayed as a rectangular area when the document data is displayed.

  The document editing method in the present application includes an input step for accepting a user operation input on document data, a document data cut-out step for generating information for specifying a specified part of the document data in the input step, and document data An information recording step for storing a data encryption key to be encrypted, encrypted data obtained by encrypting document data with the data encryption key, and information for specifying an area generated by the document cutout unit.

  Further, the information storage medium of the present application includes encrypted data obtained by encrypting document data, a data encryption key used when encrypting document data, information specifying a partial area of document data, The thumbnail data obtained by reducing the resolution of the display image of the specified partial area is recorded.

  In the above storage medium, the information for specifying a part of the area may be stroke information or information indicating a rectangle.

  The document data editing device can improve the user's usability by designating a partial data area of the document data being displayed according to the user's preference and enabling editing operations to be managed separately It becomes.

  In the document data editing apparatus, only the area information is managed instead of copying the data of the designated area. For this reason, in order to display the data in the designated area, it is not possible to correctly display without the document data, and it is possible to prevent unauthorized duplication of the document data.

Configuration diagram of document data editing apparatus according to Embodiment 1 The figure which shows the 1st example of a screen structure of the document data editing apparatus in Embodiment 1. FIG. Explanatory drawing which showed the structural example of the stroke information in Embodiment 1 The figure which shows the structural example of the extraction information management list | wrist in Embodiment 1. 7 is a flowchart showing editing processing of the document data editing apparatus in the first embodiment. The figure which shows the 2nd example of a screen structure of the document data editing apparatus in Embodiment 1. FIG. 7 is a flowchart showing screen output processing of the document data editing apparatus according to the first embodiment. The figure which shows the 1st example of a screen structure of the document data editing apparatus in Embodiment 2. FIG. The figure which shows the structural example of the extraction information management list | wrist in Embodiment 2. 7 is a flowchart showing editing processing of the document data editing apparatus in the second embodiment.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a document data editing apparatus 100 according to an embodiment of the present invention. The document data editing device 100 includes document data including a control unit 110, an information recording unit 120, an input unit 130, and an output unit 140, such as a mobile phone terminal, a smartphone, an electronic dictionary, and an electronic book dedicated terminal. It is a digital device for mobile use.

  The control unit 110 includes an encryption / decryption unit 111, a key calculation unit 112, and a document data cutout unit 113, and has a function of performing various operation controls in the document data editing apparatus 100.

  The encryption / decryption unit 111 has a function of outputting encrypted data or plaintext data in accordance with various encryption algorithms such as AES (Advanced Encryption Standard) with key data and plaintext data or encrypted data as inputs. Consists of software. In addition, description of various encryption algorithms is omitted here.

  The key calculation unit 112 has a function of calculating a key value from the data encryption key 121 recorded in the information recording unit 120 in order to calculate key data to be input to the encryption / decryption unit 111. Consists of software.

  The document data cutout unit 113 identifies and specifies that the user has selected a part of the document data displayed on the output unit 140 via the input unit 130, and the corresponding partial document data from the original document data. Is displayed on the output unit 140.

  The information recording unit 120 is a fixed or detachable information recording medium such as a semiconductor memory, a magnetic medium, or an optical medium having a function of storing the data encryption key 121, the encrypted data 122, and the cut-out area information management list 123. Although details are not described, these data may not be recorded on the same recording medium, and may be recorded on different media. In particular, the data encryption key 121 may be encrypted with another key, accessible through a special authentication process, or stored in a special area of the information recording medium.

  The data encryption key 121 is a key value used for encrypting document data.

  The encrypted data 122 is encrypted document data. The document data here refers to data obtained by adding image data or the like to data indicating characters expressed in a predetermined character code. For example, HTML (HyperText Markup Language) or XML (Extensible Markup Language) is used. ), Data described in a markup language, character type (font) and size determined for each application software, format including layout information, and the like. Examples of document data types include newspapers, magazines, and manga.

  The cutout area information management list 123 manages information for specifying a partial area of the document data identified and specified by the document data cutout unit 113, information for characterizing the area, and the like. The information for specifying the partial area includes, for example, cut-out area stroke information. A configuration example of the cut-out area stroke information will be described later.

  The input unit 130 has a function of accepting an editing operation input from a user, for example, an input of a resistance film having a sensor function, various touch panels such as a capacitance, or a pen input device having an electromagnetic induction type function. Consists of devices.

  The output unit 140 is configured with various display devices such as a liquid crystal display, an organic EL display, and electronic paper. In this embodiment, the case where document data is handled has been described as an example. However, when the target data is other than document data, for example, image data, video data, audio data, etc., The output unit 140 only needs to realize a suitable output method corresponding to each data characteristic. For example, in the case of audio data or the like, the output unit 140 is realized by a speaker.

  Although not shown in detail here, other functions such as a battery or a power source, a switch, and an acceleration sensor are also included in the configuration of the document editing apparatus.

  FIG. 2 is a diagram showing an image of an editing operation by the user in the document data editing apparatus 100. FIG. 2 illustrates an example in which the document data editing apparatus 100 includes a two-screen output unit 140. Document data is displayed on the left screen 201, and the right screen 202 is a screen for copying and pasting a part of the document data displayed on the left screen. As shown in FIG. 2A, the user designates an area of a document among various document data displayed on the left screen 201 using, for example, a pen-shaped input unit 130. In FIG. 2A, the area selected by the user with the pen is indicated by a dotted line (hereinafter, the partial data area of the document data selected by the user is referred to as a cutout area). As shown in FIG. 2B, when the user moves the pen to the right screen 202, the selected area is displayed on the right screen 202 as if it were copied. If such an operation is repeated, a screen on which only document data according to the user's preference is pasted can be configured on the right screen.

  FIG. 3 is a diagram illustrating a configuration example of stroke information. The stroke information managed in the cutout area information management list 123 is information composed of a combination of a parameter indicating the X coordinate and a parameter indicating the Y coordinate shown in FIG. The area information as shown on the screen 202 on the right side of FIG. 2 is (X0, Y0), (X1, Y1), (X2, Y2)... (Xn, Yn) shown in FIG. It is composed of a plurality of pieces of stroke information with two parameters as one set.

  FIG. 4 is a diagram showing the relationship between paste center coordinates, document data information, cut area stroke information, thumbnail data, and cut information managed by the cut area information management list 123. As shown in FIG. 4A, the cutout area information management list 123 manages combinations of paste destination center coordinates, document data information, cutout area stroke information, and thumbnail data for each cutout area.

  The paste center coordinate is a value that is indicated by two parameters, such as an X coordinate and a Y coordinate.

  The document data information is information for specifying which document data is extracted from among the document data managed by the information recording unit 120. The document data in the information recording unit 120 is specified. Information for specifying a partial area such as a data storage location, a page number for specifying a partial area in the document data, a line number, or a paragraph number is included.

  The cut-out area stroke information is a value obtained by combining two parameters as shown in FIG.

  The thumbnail data is data obtained by converting the information of the cut-out area as image data and reducing the resolution.

  Next, a data processing sequence in the document data editing apparatus 100 in which a part of the user's favorite document data as shown in FIG. 2 is cut out and copied to another screen will be described with reference to FIG.

  (Step S <b> 501) The user selects a part of the document data displayed on the output unit 140 of the document data editing apparatus 100 using the input unit 130. The document data extraction unit 113 of the control unit 110 determines which part of the document data corresponds to the selected item. In addition, the document data cutout unit 113 of the control unit 110 causes the output unit 140 to display cutout document data corresponding to the operation locus of the input unit 130. Although details are not described here, it is assumed that the document data stored in the information recording unit 120 is decrypted with the corresponding encryption key and displayed on the output unit 140.

  (Step S502) Next, the document data cutout unit 113 of the control unit 110 calculates cutout region stroke information.

  (Step S503) Next, the document data cutout unit 113 of the control unit 110 determines paste center coordinates that are positions on the display screen to which the cut out document data is pasted. The calculation method of the center coordinate is that the position indicating the middle of the difference between the minimum value and the maximum value of the X coordinate value in the cut-out area stroke information is the X coordinate, and the position indicating the middle of the difference between the minimum value and the maximum value of the Y coordinate. Is the Y coordinate, and these X and Y coordinates on the newly pasted display screen are the center coordinates.

  (Step S504) Next, the document data cutout unit 113 of the control unit 110 recognizes the data of the cutout region as image information and calculates it as low resolution data. Here, the low resolution is determined according to the screen resolution of the output unit 140 of the document data editing apparatus and the font size of the displayed document data, but is necessary when the original document data is displayed. The corresponding screen information is displayed with a smaller amount of information than the amount of information to be displayed.

  (Step S505) Next, the document data cutout unit 113 of the control unit 110 combines the data calculated in step S502 and step S503, and extracts the cutout area information in accordance with a predetermined data format of the cutout area information. Create Although not described in detail here, when the cut area information management list 123 is already stored in the information area unit 120, the control unit 110 reads the cut area information management list 123 in advance, Add the created cutout area information.

  (Step S506) Next, the control unit 110 records the cut-out area information management list 123 created in step S504 in the information recording unit 120. When recording, it may be stored in a form conforming to various file system structures such as FAT file system and UDF, or may be stored through a special authentication process provided in the information recording unit 120. I will omit the detailed description here.

  FIG. 6 is a diagram illustrating an operation example of the document data editing apparatus 100 when browsing cut-out document data information. FIG. 6A shows a display example in which the menu of the document data editing apparatus 100 is displayed on the screen 201 on the left side, and cut document data information is selected using a pen-type device. On the screen 202 on the right side, as cut document data information, for example, three pieces of information classified by file names are displayed as a list. FIG. 6B shows an example in which cut document data information is displayed. The left screen 201 shows an example of a screen configuration in which information of two pieces of cut document data is displayed as previous cut document data information, and handwriting information by a pen is further displayed.

  Next, as shown in FIG. 6B, the data processing sequence when the cut document data information is displayed on the output unit 140 of the document data editing apparatus 100 will be described with reference to FIG.

  (Step S <b> 701) The input unit 130 of the document data editing apparatus 100 receives input from the user and determines cut document data to be displayed on the output unit 140.

  (Step S702) Next, the control unit 110 reads out the cutout area information management list 123 stored in the information recording unit 120, and cutout area stroke information as cutout area information corresponding to the cutout document data determined in step S701. Then, the thumbnail data that is the low-resolution image of the clipped document data is read out.

  (Step S703) Next, the control unit 110 displays the thumbnail data read in step S702 on the output unit 140.

  (Step S704) Next, the control unit 110 reads the data encryption key 121 and the encrypted data 122 stored in the information recording unit 120.

  (Step S705) Next, the key calculation unit 112 of the control unit 110 decrypts the data encryption key 121 read from the information recording unit 120 via the encryption / decryption unit 111 as necessary, and decrypts the data for decryption. Calculate the key.

  (Step S706) Next, the encryption / decryption unit 111 of the control unit 110 decrypts the encrypted data 122 read from the information recording unit 120 with the decryption key calculated by the key calculation unit 112, and normalizes the data.

  (Step S707) Next, the control unit 110 specifies the cut-out data to be displayed on the output unit 140 from the cut-out area information management list 123 read out in step 702 and the data decoded in step S706.

  (Step S708) Next, the control unit 110 changes and displays the thumbnail data displayed on the output unit 140 in step S703 to the data specified in step S707.

  As described above, the document data editing apparatus 100 cuts out a part of the data selected by the user from the document data and displays the data to be pasted on a new screen. The thumbnail data, etc., and the process of copying the data internally is not performed. As a result, a part of the document data can be cut out like a scrap for the user. On the other hand, the cut out document data cannot be displayed without the cut-out source data. It becomes possible to prevent unauthorized duplication.

Although the configuration of the document data editing apparatus has been described in the present embodiment, the present invention is of course not limited to the above-described embodiment. Implementation can be changed without departing from the spirit of the present invention. For example, the present invention includes the following cases.
(1) In the above embodiment, an example is shown in which the cutout area information management list 123 includes the center coordinates (paste destination center coordinates) when the cutout area is pasted on a new screen. The calculation method is not as described above, and any method may be used. Moreover, as long as the position to be pasted can be specified, any method may be used such as managing the upper left coordinate of the cutout area instead of the center coordinate.

(Embodiment 2)
Since this embodiment has many configurations similar to those of the first embodiment, only different points will be described.

  FIG. 8 is a diagram showing an image of an editing operation by the user in the document data editing apparatus 100 according to the present embodiment. The difference from the first embodiment is that the document data editing apparatus 100 displays and manages the selected area as a rectangular area by a user's operation with a pen. As shown in FIG. 2A, when a user touches a certain area of the various document data displayed on the left screen 201 with the pen-shaped input unit 130, a rectangular area is displayed. By moving the shape input unit 130, the rectangular information is automatically displayed. In FIG. 2A, the region selected by the user with the pen is indicated by a dotted line. As shown in FIG. 2B, when the user moves the pen to the right screen 202, the selected area is displayed on the right screen 202 as if it was copied.

  FIG. 9 is a diagram showing the relationship between the information managed in the cutout area information management list 123 and the cutout information in the present embodiment. As shown in FIG. 9A, the cutout area information management list 123 manages the combination of paste destination coordinate information, document data information, cutout area rectangle information, and thumbnail data for each cutout area.

  The paste destination coordinate information is a value such that the upper left coordinate in the region on the screen that is the paste destination is indicated by two parameters such as an X coordinate and a Y coordinate.

  The document data information is information for identifying which document data is extracted from among the document data managed by the information recording unit 120. The storage location of the document data in the information recording unit 120, the corresponding page number It is information which shows.

  As shown in FIG. 9B, the cut-out area rectangle information is a value obtained by combining parameters indicating the X-coordinate and Y-coordinate information at the upper left of the cut-out area, the height and width of the cut-out rectangle.

  The thumbnail data is data obtained by converting the information of the cut-out area as image data and reducing the resolution.

  Next, the processing sequence of the cut document in the document data editing apparatus 100 will be described with reference to FIG.

  (Step S <b> 1001) A user selects a part of document data displayed on the output unit 140 of the document data editing apparatus 100 using the input unit 130. The document data editing apparatus 100 recognizes the selected area as rectangular information. The document data cutout unit 113 of the control unit 110 determines which portion of the document data corresponds to the selected item as rectangular information. In addition, the document data cutout unit 113 of the control unit 110 causes the output unit 140 to display cutout document data corresponding to the operation locus of the input unit 130. Although details are not described here, it is assumed that the document data stored in the information recording unit 120 is decrypted with the corresponding encryption key and displayed on the output unit 140.

  (Step S1002) Next, the document data cutout unit 113 of the control unit 110 calculates the cutout area as rectangular information.

  (Step S1003) Next, the document data extraction unit 113 of the control unit 110 determines the upper left coordinates of the position where the extracted document data is pasted.

  Since steps S504 to S506 are the same as the contents described in step S504 to step S506 in FIG. 5 described in the first embodiment, detailed description thereof is omitted here.

  Since the data processing sequence when the cut document data information is displayed on the output unit 140 is the same as that shown in FIG. 7, detailed description thereof is omitted here.

  As described above, the document data editing apparatus 100 cuts out a part of the data selected by the user from the document data and displays the data to be pasted on a new screen, but the data to be managed is a rectangle of the area to be cut out. It is information and its thumbnail data, etc., and processing that copies data internally is not performed. Thereby, for the user, a part of the document data can be cut out like a scrap, while the cut out document data cannot be displayed without the original data, It becomes possible to prevent unauthorized duplication of document data.

  Although the configuration of the document data editing apparatus 100 has been described in the present embodiment, it is needless to say that the present invention is not limited to the above-described embodiment. Various modifications can be made without departing from the spirit of the present invention. For example, the present invention includes the following cases.

  In the above-described embodiment, an example in which the extracted area information management list 123 includes the upper left coordinates when the extracted area is pasted on a new screen is shown. Coordinates can be used. Any method may be used as long as the position to be pasted can be specified.

  Further, for example, the following cases common to the first and second embodiments are also included in the present invention.

  (1) In the above embodiment, an example in which thumbnail data is included in the cut-out area information management list 123 is shown, but it may not be thumbnail data. A predetermined image may be stored. Further, character data or the like may be stored.

  (2) In the above embodiment, the clipped area information management list 123 shows an example in which thumbnail data is included as low-resolution data. However, data including non-low-resolution data including signature information and the like is included in the image information. The configuration included as

  (3) In the above embodiment, when the document data editing apparatus 100 displays the cut document on the output unit 140, the thumbnail data included in the cut region information management list 123 is displayed first. Processing that does not display thumbnail data may be performed. At this time, it may be configured such that firstly determined data is displayed, and then the cut-out area information is displayed when the cut-out area information is determined.

  (4) The format of the cutout area information management list 123 shown in the above embodiment is not limited. Any information may be used as long as the information can manage the cutout area of the document data.

  (5) Although the document data has been described as an example in the above embodiment, the present embodiment is not limited to this. In addition to document data, image data, video data, music data, and the like may be used. In that case, it is possible to cope with the same as in the case of the document data by using an input method, an output method, or the like according to the type of the data.

  In the document data editing apparatus and the document data editing method according to the present invention, the document data itself is not copied by holding only the information of the selected area as part of the document data selected by the user. Therefore, unauthorized copying of a document can be prevented, and the present invention can be applied to an information processing device having a function for editing document data.

DESCRIPTION OF SYMBOLS 100 Document data editing apparatus 110 Control part 111 Encryption / decryption part 112 Key calculation part 113 Document data extraction part 120 Information recording part 121 Data encryption key 122 Encrypted data 123 Extraction area | region information management list 130 Input part 140 Output part 201 Document data editing apparatus Screen 202 on the left side Screen on the right side of the document data editing device

Claims (8)

An input unit that accepts user operation input on document data;
A document data cutout unit that generates information for identifying a specified partial area of the document data by the input unit;
An information recording unit storing a data encryption key for encrypting the document data, encrypted data obtained by encrypting the document data with the data encryption key, and information for specifying an area generated by the document cutout unit When,
A document data editing device.   The document data editing apparatus according to claim 1, wherein the information recording unit further stores thumbnail data obtained by reducing the resolution of a display image of a specified region of the document data.   The document data editing apparatus according to claim 1, wherein the information recording unit further stores cut-out area stroke information having a plurality of stroke information for specifying a specified partial area of the document data.   The document data editing apparatus according to claim 1, wherein the partial area of the document data is an area displayed as a rectangular area when the document data is displayed. An input step for accepting user operation input on document data;
A document data cutting step for generating information for identifying a specified partial area of the document data by the input step;
An information recording step for storing a data encryption key for encrypting the document data, encrypted data obtained by encrypting the document data with the data encryption key, and information for specifying an area generated by the document cutout unit When,
Document data editing method with Encrypted data obtained by encrypting document data,
A data encryption key used when encrypting the document data;
Information identifying a partial area of the document data;
Thumbnail data obtained by reducing the resolution of the display image of the specified partial area;
An information recording medium for recording.   The information recording medium according to claim 6, wherein the information specifying the partial area is stroke information.   The information recording medium according to claim 6, wherein the information specifying the partial area is information indicating a rectangle.