JP2007072698A - Bulletin board system, bulletin board server, and bulletin board browsing control method - Google Patents

Abstract

An object of the present invention is to make it possible to arbitrarily specify a viewable range in the text of a created bulletin board.
In a bulletin board server 2 to which a plurality of user terminals 3 (an input terminal 3a and a browsing terminal 3b) are connected, a browsing range within a text 11 inputted from the input terminal 3a and a browsing including a browsing permitted person. The viewing condition 23 is transmitted as the viewing key 30 to the user terminal (browsing terminal 3 b) of the viewing authorized person specified by the condition 23. Further, the text 11 input from the input terminal 3 a is stored in the text storage file 7 with a viewing key 30 attached. Further, the browsing key 30 included in the browsing request input from the browsing terminal 3 b is collated with the browsing key 30 stored in the text storage file 7. Based on the collation result, the text 46 in the viewable range is read from the text storage file 7 and transmitted to the browsing terminal 3b.
[Selection] Figure 2

Description

  The present invention stores and holds the bulletin board text created at each user terminal in the bulletin board server, and transmits the bulletin board text stored and held in response to the browsing request from each user terminal to the browsing request source user terminal. The present invention relates to a bulletin board system to be browsed, a bulletin board server incorporated in the bulletin board system, and a bulletin board browsing control method.

  It has been practiced to open a bulletin board on a network such as the Internet or a LAN so that an unspecified number of people can view the bulletin board, or only authorized persons can view the bulletin board.

In particular, Patent Document 1 discloses an example of a technique that allows only authorized persons to view a bulletin board. In this example, information that associates the viewer specified by the data provider with the data to be browsed is registered in the database, and when a browsing request is input from the terminal via the network, the viewer is registered in the database. It is possible to browse the data to be browsed only when it has been.
JP-A-2005-78517

  However, in the above-described technology, a viewer (viewer permitted) is set for the entire data to be browsed created by the data provider. Therefore, when a data provider creates long text data and posts this long text data on a bulletin board on the network, only a part of the long text data is viewed only by a specific viewer. I couldn't make it possible.

  Further, it is impossible to divide long text data into a plurality of pieces and assign a viewer separately to each range of the divided text data.

  In some text data to be posted on the bulletin board, it may be preferable to limit the browsing period, the number of browsing times, the availability of printing, and the like. However, in the above-described technique, as long as the viewer is registered in the database, the viewer can browse the text data to be browsed unconditionally. Therefore, there is a problem that the browsing control cannot be set in detail upon request.

  The present invention has been made in view of such circumstances, and it is possible to arbitrarily specify a viewable range in the text of the created bulletin board, and to specify the viewing conditions including the viewable range and the authorized viewer. For the text creator of the bulletin board, the target text can be easily provided to the target viewer, and the browsing conditions at that time can be arbitrarily specified, and the usability can be improved for both the text provider and the viewer. It is an object of the present invention to provide a bulletin board system, a bulletin board server incorporated in the bulletin board system, and a bulletin board browsing control method.

In order to solve the above-mentioned problems, the present invention comprises a bulletin board server and a plurality of user terminals connected to each other via a communication line, and the bulletin board text created by the user terminal designated as the input terminal is displayed on the bulletin board server. In the bulletin board system that stores and holds the text of the bulletin board stored and held in the bulletin board server in response to the browsing request from the user terminal designated as the browsing terminal, and transmits it to the browsing terminal of the browsing request source.
The input terminal includes at least a viewable range in the created text, a viewing condition setting means for setting a viewing condition including a viewing authorized person, and a sending means for transmitting the set viewing condition and the created text to the bulletin board server; Have

  The bulletin board server has a transmission means for transmitting the browsing condition as a browsing key to a browsing-permitted user terminal specified by the browsing condition input from the input terminal, and stores the text input from the input terminal with the browsing key as text. Storage processing means stored in the file, collation means for collating the browsing key input from the viewing terminal with the browsing key stored in the text storage file, and the range that can be browsed from the text storage file based on the collation result of the collation means Transmitting means for reading out the text and transmitting it to the viewing terminal.

  Furthermore, the browsing terminal includes a transmission unit that transmits the browsing key transmitted from the bulletin board server as a browsing request to the bulletin board server, and an output unit that outputs the text of the browsing possible range input from the bulletin board server.

  In the bulletin board system configured as described above, an operator (input person) of a user terminal (input terminal) designated as an input terminal by a user among a plurality of user terminals first operates the input terminal to operate the bulletin board. Create text for Thereafter, the operator (input person) sets a browsing condition in the created text and a browsing condition including a browsing permitted person. Then, browsing conditions and text are transmitted to the bulletin board server.

  The bulletin board server transmits the received browsing condition as a browsing key to the user terminal of the browsing authorized person. Further, the input text is stored in a text storage file with a viewing key. The browsing person operates the browsing terminal and transmits the browsing key input from the bulletin board server to the bulletin board server as a browsing request.

  Then, the bulletin board server collates the browsing key input from the browsing terminal with the browsing key stored in the text storage file, and if the verification result is good, reads the text in the browsing range from the text storage file and sends it to the browsing terminal. Send. The browsing terminal outputs a text in a browseable range.

  Therefore, the text creator of the bulletin board can easily provide the target text to the target viewer, and the browsing conditions at that time can be arbitrarily designated.

  Another invention is the bulletin board system according to the invention described above, wherein each user terminal has a unique key, and the bulletin board server creates a combination key that creates a combination key including a browsing key and a browsing authorized person's unique key. And a combination key reproducing means for reproducing a combination key including the browsing key transmitted from the browsing terminal and the unique key of the browsing terminal. Further, the storage processing means stores the input text with the combination key and stores it in the text storage file, and the collation means collates the reproduced combination key browsing key and the browsing key stored in the text storage file.

  In the bulletin board system configured as described above, a combination key including a browsing key and a unique key of a browsing authorized person is created in the bulletin board server, and the input text is attached to the text storage file with the combination key. Stored. Further, a combination key including the browsing key input from the browsing terminal and the unique key of the browsing terminal is reproduced. Therefore, since the combination keys are collated, higher security can be ensured for the created text.

  Further, in another invention, in the bulletin board system according to the invention described above, the browsing conditions include at least a viewable range in the created text, the number of times of browsing, and a viewing permitted person. The bulletin board server transmits combination text update means for updating the browse key of the reproduced combination key after transmission of the text in the viewable range to the browsing terminal, and transmission for transmitting the updated browsing key to the user terminal of the authorized viewer. Means. The storage processing means stores the input text in the text storage file with the updated combination key.

  In the bulletin board system configured as described above, since the number of times of browsing is included in the browsing conditions, every time a viewer who is permitted to browse browses the text specified by the user, the number of times of browsing is updated. Therefore, the viewer cannot browse the text beyond the number of times of browsing specified in the viewing conditions.

  In another invention, in the bulletin board system according to the invention described above, each user terminal has a unique key distributed from the bulletin board server, and text transmitted and received between each user terminal and the bulletin board server is transmitted or received. It is encrypted using the unique key of the user terminal to be used.

  In the bulletin board system configured as described above, the text transmitted and received between each user terminal and the bulletin board server is encrypted, so that the security of the transmitted and received text is improved. In this case, since each transmitted / received text is encrypted using the unique key of the user terminal to be transmitted or received, the security of the text is further improved.

Another invention is a bulletin board server incorporated in a bulletin board system. That is, a plurality of user terminals are connected via a communication line, and the text on the bulletin board created by the user terminal designated as the input terminal is stored and held, and in response to a viewing request from the user terminal designated as the viewing terminal In the bulletin board server for sending and browsing the stored bulletin board text to the viewing request source browsing terminal,
A transmission means for transmitting a browsing condition as a browsing key to a user terminal of a browsing authorized person specified by a browsing range including at least a browsing permitted range of the created text input from the input terminal and a browsing permitted person; and an input terminal The storage processing means for storing the text input from the browsing key with the browsing key and the browsing key included in the browsing request input from the browsing terminal and the browsing key stored in the text storage file And a transmission means for reading the text in the viewable range from the text storage file based on the collation result of the collation means and transmitting it to the browsing terminal.

  Also in the bulletin board server configured as described above, the text creator of the bulletin board operating the input terminal can easily provide the target text to the intended viewer, and the browsing conditions at that time can be arbitrarily designated. Therefore, substantially the same operational effects as the bulletin board system described above can be obtained.

Another invention is a bulletin board browsing control method. That is, a plurality of user terminals are connected via a communication line, and the text on the bulletin board created by the user terminal designated as the input terminal is stored and held, and in response to a viewing request from the user terminal designated as the viewing terminal In the bulletin board browsing control method for sending and browsing the stored bulletin board text to the browsing request source browsing terminal,
A transmission step of transmitting the browsing condition as a browsing key to the user terminal of the permitted viewing person specified by the browsing condition including at least the permitted viewing range of the created text input from the input terminal and the browsing permitted person, and the input terminal; A storage processing step of storing the text input from the browsing key with a browsing key stored in the text storage file, and a verification step of verifying the browsing key included in the browsing request input from the browsing terminal and the browsing key stored in the text storage file And a transmission step of reading the text in the viewable range from the text storage file based on the collation result of the collation step and transmitting it to the browsing terminal.

  The bulletin board server configured as described above can achieve substantially the same operational effects as the bulletin board system described above.

  In the present invention, a browsing condition including a browsing range and a browsing authorized person in the browsing range is specified in the text of the bulletin board created on the input terminal.

  Therefore, for the text creator of the bulletin board, the target text can be easily provided to the target viewer, and the browsing conditions at that time can be arbitrarily specified, improving the usability for both the text provider and the viewer. it can.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing a schematic configuration of a bulletin board system in which a bulletin board server to which a bulletin board browsing control method according to an embodiment of the present invention is applied is incorporated. This bulletin board system includes, for example, one bulletin board server 2 and a plurality of user terminals 3 connected to each other via a LAN 1 as a communication line. Each user terminal 3 includes a bulletin board creation mode in which the user (operator) of the user terminal 3 creates the text of the bulletin board, and a bulletin board browsing mode in which the user (operator) of the user terminal 3 browses the text of the bulletin board. It has two business modes, and operates as the “input terminal 3a” in the bulletin board creation mode, and operates as the “browsing terminal 3b” in the bulletin board browsing mode.

  FIG. 2 is a block diagram showing a schematic configuration of the bulletin board server 2 configured by, for example, a computer. In the bulletin board server 2, a communication unit 4 for exchanging various information with each user terminal 3 (input terminal 3a, browsing terminal 3b) via the LAN 1, a unique key management table 5, a bulletin board user table 6, a text storage A file 7 is provided.

  In the unique key management table 5, as shown in FIG. 3, the user name (A, B, C,..., Z) of the user who operates each user terminal 3, and the unique key 8 set for the corresponding user, The relationship is remembered. Each unique key 8 set in the unique key management table 5 is distributed by the unique key management unit 9 to the user terminal 3 of each user via the communication unit 4 and the LAN 1.

  In the bulletin board user table 6, as shown in FIG. 4, personal information such as the affiliation of each user (A, B, C,... .

  In the text storage file 7, as shown in FIG. 6, a plurality of texts 11 with a combination key 10 added are stored.

  FIG. 7 is a block diagram showing a schematic configuration of each user terminal 3 (input terminal 3a, browsing terminal 3b) configured by, for example, a computer. In the user terminal 3, the bulletin board server 2 that is input via the unique key input unit 13 and the communication unit 12 that exchanges various information with the bulletin board server 2 of FIG. A unique key memory 14 for storing and holding the unique key 8, a bulletin board creation screen memory 15, a display unit 16, an operation unit 17, and a browsing key memory 18 are provided.

  The bulletin board creation screen memory 15 stores a bulletin board creation screen having the format 19 of the text 11 shown in FIG. In the format 19, a plurality of columns 20 each having a character range of a predetermined number of lines including a certain number of characters (number of unit characters) are formed. The user (input person) writes one unit document (one message) of the title and the body (document) in one column 20 or a plurality of columns 20 in units of the column 20. That is, for the text 11 on the bulletin board, the viewable range can be specified in units of 20 columns. That is, in addition to the unit of one document (one message), the viewable range can be specified in units of columns 20 in one unit document and in units of a plurality of documents (multiple messages). In addition, the user (input person) can also designate one character unit among characters written on the bulletin board when designating the viewable range. In this case, one column 20 becomes one character.

  Further, the bulletin board creation screen memory 15 stores a browsing-permitted person setting screen 21 shown in FIG. 9A and a browsing condition setting screen 22 shown in FIG. 9B. The browsing permitted person setting screen 21 is a list of browsing permission candidates in the bulletin board user table 6 transmitted from the bulletin board server 2.

  The user (input person) who created the text 11 is a viewing permitted person (for example, B 1st part) designated on the viewing permitted person setting screen 21 on the display screen of the viewing condition setting screen 22 displayed on the display unit 16. ) 23a and a browsing condition 23 including a browsing value, a browsing period, a browsing count, a browsing range, a printing capability, a saving capability for a storage unit, and the like can be set.

  In this case, it is possible to set individual browsing conditions 23 for each browsing authorized person. Therefore, a plurality of viewing conditions 23 can be set for one text 11.

  Next, the bulletin board text creation and browsing condition setting process in the user terminal 3, the storage process of the text 11 in the bulletin board server 2, and the bulletin board text browsing process in the user terminal 3 will be described in order.

  The text creation unit 24 of the user terminal 3 (input terminal 3 a) in FIG. 7 displays a bulletin board creation screen having the format 19 shown in FIG. 8A on the display unit 16, and the user (input person) is on the format 19. The created text 11 shown in FIG. 8B is sent to the viewing condition transmission unit 26 in response to the “Disclosure destination setting” button operation and is also sent to the text transmission unit 27 in response to the “input complete” button operation. .

  The browsing condition creation unit 25 displays the browsing-permitted person setting screen 21 and the browsing condition setting screen 22 shown in FIGS. 9A and 9B on the display unit 16 so that the user (input person) can view the browsing condition setting screen 22. The viewing condition 23 created in step S is transmitted to the viewing condition transmission unit 26 in response to the “set” button operation. The browsing condition transmission unit 26 attaches the bulletin board No to the browsing condition 23 and transmits it to the bulletin board server 2 via the communication unit 12.

  The text transmission unit 27 encrypts the created text 11 with its own unique key 8 stored in the unique key memory 14 and transmits it to the bulletin board server 2 via the communication unit 12.

  The browsing condition input unit 28 of the bulletin board server 2 in FIG. 2 sends the browsing condition 23 with the bulletin board No. input from the user terminal 3 to the communication unit 4 to the browsing key generation unit 29. As shown in FIG. 5, the browsing key generation unit 29 newly defines the browsing condition 23 to which the bulletin board No is attached as a browsing key 30, and combines the created browsing key 30 with the combination key generating unit 31 and the browsing key transmission. Send to unit 32. The browsing key transmission unit 32 searches the unique key management table 5 and the bulletin board user table 6 for the user terminal 3 of the browsing authorized person included in the browsing condition 23, and the user terminal 3 of the browsing permitted person (the browsing terminal 3b). The browsing key 30 is transmitted via the communication unit 4.

  The combination key creating unit 31 searches the unique key 8 of the authorized person included in the viewing condition 23 from the unique key management table 5 and the bulletin board user table 6 and, as shown in FIG. The combination key 10 combined with the person key (key 8 unique to the viewing authorized person) is created and sent to the combination key adding unit 33.

  FIG. 10 shows three browsing conditions (browsing provision) created for the same browsing authorized person 23a using the browsing condition setting screen 22 from one text 11 created on the bulletin board in the input terminal 3a. It is a figure which shows an example of the data format which shows the principal part of the browsing key 30 containing the selection value 23b of.

  The browse key 30 itself is displayed in binary. The total number of columns of the target text 11 and the designated number of browsing (viewing provision) (number of attribute patterns) are set in the head area, and three selection values 23b are set in order after the head area. Each selection value 23b includes a start date, an end date, an attribute bit string, and a column bit string (range).

  In the start date, [20050801] indicates that the viewable start date is August 1, 2005. In the end date, [20050831] indicates that the browseable end date is August 31, 2005. In FIG. 10, the portion [9311011100000111000111110111000000000001] corresponds to the combination key 10, but the portion [9] [3] is substantially obtained by replacing [9] [3], which is the decimal number, with a binary number. Combination key 10. In addition, the start date [20050831] and the end date [20050831] are respectively [1] and [1] in FIG. 10, but [20050801] and [20050831] are binary numbers for these portions. Any bit example that can be discriminated is acceptable.

  Further, the first bit in the 8-digit attribute bit string indicates print enable / disable information, and the second bit indicates document storage enable / disable information. The 3 to 8 bits indicate the number of times browsing is permitted.

  A column bit string (range) consisting of 9 bits designates each column 20 indicating the viewable range in the text 11 of the designated browsing (browsing provision). For example, the head selection value 23b indicates that the viewable range is designated over the first, second, and third columns 20 in the text 11 in total.

  The text input unit 34 in the bulletin board server 2 in FIG. 2 receives the text 11 received from the user terminal 3 (input terminal 3a) via the communication unit 4 and is the user terminal 3 (source terminal) registered in the unique key management table 5 ( Decryption is performed using the unique key 8 of the input terminal 3 a) and the result is sent to the combination key adding unit 33. The combination key adding unit 33 adds the combination key 10 to the decrypted text 11 and writes it in the text storage file 7 shown in FIG.

  Next, the browsing key input unit 32a in the user terminal 3 (the browsing terminal 3b) of FIG. 7 of the browsing authorized person who has received the browsing key 30 from the bulletin board server 2 temporarily stores the received browsing key 30 in the browsing key memory 18. To do. The browsing key input unit 35 stores the browsing key transmission unit 36 in the browsing key memory 18 when a browsing operation that designates a browsing target is performed under the operation unit 17 of the operator (browser). The browse key 30 to be browsed is read and transmitted to the bulletin board server 2 via the communication unit 12. Thereafter, the browsing key transmission unit 36 deletes the corresponding browsing key 30 in the browsing key memory 18.

  The browsing key input unit 37 of the bulletin board server 2 in FIG. 2 sends the browsing key 30 transmitted from the user terminal 3 (browsing terminal 3 b) to the communication unit 4 to the combination key reproduction unit 38. Similar to the combination key creation unit 31 described above, the combination key reproduction unit 38 displays the unique key 8 of the authorized person included in the viewing condition 23 of the viewing key 30 transmitted from the user terminal 3 (browsing terminal 3b). A search is made from the unique key management table 5 and the bulletin board user table 6, and as shown in FIG. 5, the combination key 10 in which the browse key 30 and the authorized key 8 of the authorized person are added is created again to check the combination key. To the unit 39.

  The combination key check unit 39 confirms that the combination key 10 reproduced this time matches the combination key 10 added to the text 11 stored in the text storage file 7. Further, the combination key check unit 39 verifies the viewing condition 23 included in the combination key 10 and determines whether or not the text 46 in the range (column) designated by the viewing condition 23 can be viewed. In this embodiment, the period and the number of times are checked. The check result is sent to the combination key adding unit 41.

  The combination key update unit 40 performs an update process on the checked combination key 10. In this embodiment, the number of viewing conditions 23 included in the combination key 10 is reduced and updated. The updated combination key 10 is sent to the combination key adding unit 41. The combination key adding unit 41 replaces the combination key 10 added to the text 11 stored in the text storage file 7 with the updated combination key 10. In addition, the combination key adding unit 41, when browsing is permitted, the text transmission unit 46 converts the text 46 in the browsable range indicated by the column bit string designated by the browsing condition 23 of the text 11 stored in the text storage file 7. 42.

  The text transmission unit 42 encrypts the text 46 in the range specified by the viewing condition 23 with the unique key 8 of the user terminal 3 (browsing terminal 3b) that is the viewing request source, and transmits the text of the viewing request source via the communication unit 4. It transmits to the user terminal 3 (viewing terminal 3b).

  Further, the combination key update unit 40 transmits the browsing key 30 included in the updated combination key 10 to the user terminal 3 (viewing terminal 3 b) of the viewing-permitted person included in the browsing condition 23 via the communication unit 4.

  Next, the text input unit 43 in the user terminal 3 (browsing terminal 3 b) of FIG. 7 of the authorized person who has received the text 46 in the range specified by the browsing condition 23 of the text 11 from the bulletin board server 2 receives the input text 46. Is decrypted using the unique key 8 of the transmission source user terminal 3 registered in the unique key management table 5 and sent to the text display unit 44. The text display unit 44 displays and outputs the input text 46 on the display unit 16 as shown in FIG.

  Further, the updated browsing key input unit 45 in the user terminal 3 (browsing terminal 3b) of FIG. 7 of the browsing authorized person who has received the browsing key 30 from the bulletin board server 2 uses the updated browsing key 30 that has been input as the browsing key memory 18. Write to.

  FIG. 12 is a sequence diagram showing information exchange between the bulletin board server 2, the input terminal 3a (user terminal 3), and the browsing terminal 3b (user terminal 3), showing the overall operation of the bulletin board system configured as described above. is there.

  The bulletin board server 2 distributes the unique key 8 to the input terminal 3a (user terminal 3) and the browsing terminal 3b (user terminal 3), respectively (S1, S2). The input terminal 3a (user terminal 3) and the browsing terminal 3b store the received unique key 8 in the unique key memory 14 respectively.

  The input terminal 3a transmits a bulletin board creation request with its own unique key 8 to the bulletin board server 2 (S3). When a permission notice is input from the bulletin board server 2 (S4) and a browsing permission candidate list is input (S5), the input terminal 3a creates the text 11 of the bulletin board and sets the browsing condition 23. The input terminal 3a transmits the viewing condition 23 and the text 11 to the bulletin board server 2 (S6, S7).

  The bulletin board server 2 creates the browsing key 30 and the combination key 10 from the received browsing conditions 23. Further, the combination key 10 is added to the text 11 and written in the text storage file 7. Then, the bulletin board server 2 transmits the browsing key 30 to the browsing terminal 3b (user terminal 3) (S8).

  The browsing terminal 3b (user terminal 3) temporarily stores the received browsing key 30 in the browsing key memory 18. Then, the browsing terminal 3b (user terminal 3) transmits a bulletin board browsing request with its own unique key 8 to the bulletin board server 2 (S9). When a permission notice is input from the bulletin board server 2 (S10), the browsing terminal 3b (user terminal) transmits the browsing key 30 stored in the browsing key memory 18 to the bulletin board server 2 (S11) and browsing. The browsing key 30 in the key memory 18 is deleted.

  The bulletin board server 2 that has received the browse key 30 creates the combination key 10 using the received browse key 30 and collates (checks) the combination key 10 stored in the text storage file 7. Based on the collation result, the text 46 in the range (column) designated by the viewing condition 23 of the text 11 is transmitted to the viewing terminal 3b (user terminal 3) (S12). Further, the bulletin board server 2 updates the combination key 10 and replaces the combination key 10 added to the text 11 stored in the text storage file 7 with the updated combination key 10. Then, the updated browsing key 30 is transmitted to the browsing terminal 3b (user terminal 3) (S13).

  The browsing terminal 3b (user terminal 3) displays the text 46 in the range (column) designated by the browsing condition 23 of the received text 11 on the display unit 16 and displays the received updated browsing key 30 on the browsing key memory 18. Write to.

  In the bulletin board system configured as described above, an input person of the user terminal 3 designated by the user as the input terminal 3a among the plurality of user terminals 3 connected to the LAN 1 first operates the input terminal 3a. Then, the bulletin board creation screen is displayed on the display unit 16 to create the text 11 shown in FIG. 8B. Further, the browsing permitted person setting screen 21 and the browsing condition setting screen 22 are displayed on the display unit 16 to allow browsing. The viewing condition 23 can be set such as a person, browsing permission, browsing period, browsing count, browsing possible range, printing permission, storage permission / non-storage.

  The bulletin board server 2 transmits the received browsing condition 23 as the browsing key 30 to the user terminal 3 (browsing terminal 3b) of the browsing authorized person. The browsing terminal 3b (user terminal 3) that has received the browsing key 30 transmits the browsing key 30 to the bulletin board server 2 as a browsing request. Then, the bulletin board server 2 collates the browsing key 30 input from the browsing terminal 3b with the browsing key 30 of the combination key 10 stored in the text storage file 7, and the browsing key 30 and the text input from the browsing terminal 3b in the matching result. If the browse key 30 of the combination key 10 stored in the storage file 7 matches, the text 46 in the viewable range is read from the text storage file 7 and transmitted to the browsing terminal 3b. The browsing terminal 3b outputs the text 46 of the browsing possible range.

  Therefore, it is possible for the text creator of the bulletin board operating the input terminal 3a (user terminal 3) to easily provide the intended viewer with the text 46 in the target column 20 of the text 11 as a whole. The browsing conditions at that time can also be specified arbitrarily.

  In addition, since the number of times of browsing is included in the browsing condition 23, each time a viewer who is permitted to browse browses the text 46 designated by the user, the number of times of browsing is reduced and updated. The text 46 cannot be browsed beyond the number of browsing times specified in the condition. Further, the text 46 whose browsing deadline has expired cannot be browsed. Thus, the text creator of the bulletin board can arbitrarily set the viewing condition 23 of the text 11 (46).

  Furthermore, since the text transmitted / received between each user terminal 3 (input terminal 3a, browsing terminal 3b) and the bulletin board server 2 is encrypted, the security of the transmitted / received text is improved. In this case, since each transmitted / received text is encrypted using the unique key 8 of the user terminal to be transmitted or received, the security of the text is further improved.

1 is a schematic diagram showing a schematic configuration of a bulletin board system incorporating a bulletin board server to which a bulletin board browsing control method according to an embodiment of the present invention is applied. The block diagram which shows schematic structure of the bulletin board server integrated in the bulletin board system of the embodiment. The figure which shows the memory content of the unique key management table provided in the bulletin board server incorporated in the bulletin board system of the embodiment. The figure which shows the memory content of the bulletin board user table provided in the bulletin board server incorporated in the bulletin board system of the embodiment. The figure which shows the relationship between the browsing key and combination key in the bulletin board system of the embodiment. The figure which shows the memory content of the text storage memory provided in the bulletin board server incorporated in the bulletin board system of the embodiment. The block diagram which shows schematic structure of the user terminal integrated in the bulletin board system of the embodiment. The figure which shows the bulletin board creation screen displayed on the display part of the user terminal integrated in the bulletin board system of the embodiment. The figure which shows the browsing permission person setting screen and browsing condition setting screen which were displayed on the display part of the user terminal integrated in the bulletin board system of the embodiment. The figure which shows an example of the browsing conditions contained in the browsing key in the bulletin board system of the embodiment. The figure which shows the text displayed on the display part of the user terminal integrated in the bulletin board system of the embodiment. The sequence diagram which shows the whole operation | movement of the bulletin board system of the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... LAN, 2 ... Bulletin board server, 3 ... User terminal, 3a ... Input terminal, 3b ... Reading terminal, 4,12 ... Communication part, 5 ... Unique key management table, 6 ... Bulletin board user table, 7 ... Text management file , 8 ... Unique key, 10 ... Combination key, 11, 46 ... Text, 14 ... Unique key memory, 15 ... Bulletin board creation screen memory, 16 ... Display unit, 17 ... Operation unit, 18 ... Browsing key memory, 19 ... Format, DESCRIPTION OF SYMBOLS 20 ... Column, 21 ... Browsing permission person setting screen, 22 ... Browsing condition setting screen, 23 ... Browsing condition, 24 ... Text creation part, 25 ... Browsing condition creation part, 26 ... Browsing condition transmission part, 27, 42 ... Text transmission , 28 ... browsing condition input unit, 29 ... browsing key creation unit, 30 ... browsing key, 31 ... combination key creation unit, 32, 36 ... browsing key transmission unit, 32a, 37 ... browsing key input unit, 3 41 ... combination key addition unit 34,43 ... text input unit 35 ... browsing operation input unit 38 ... combination key playback unit 39 ... combination key check unit 40 ... combination key update unit 44 ... text display unit 45 ... Update browsing key input section

Claims (6)

The bulletin board server is composed of a bulletin board server and a plurality of user terminals connected to each other via a communication line. The bulletin board text created by the user terminal designated as the input terminal is stored in the bulletin board server and designated as the browsing terminal. In the bulletin board system that transmits the text of the bulletin board stored in the bulletin board server in response to the browsing request from the user terminal to the browsing terminal of the browsing request source and browses it,
The input terminal sets a browsing condition setting means for setting a browsing condition including at least a browsing possible range and a browsing permitted person in the created text, and the set browsing condition and the created text to the bulletin board server. Transmission means for transmitting,
The bulletin board server includes a transmission unit that transmits the browsing condition as a browsing key to a user terminal of a browsing-permitted person specified by the browsing condition input from the input terminal, and the text input from the input terminal is used as the browsing key. And a storage processing means for storing in the text storage file, a verification means for verifying the browsing key input from the browsing terminal and the browsing key stored in the text storage file, and based on the verification result of the verification means, Transmission means for reading the text of the viewable range from the text storage file and transmitting it to the viewing terminal;
The browsing terminal includes a transmission unit that transmits the browsing key transmitted from the bulletin board server as a browsing request to the bulletin board server, and an output unit that outputs the text of the browsing range input from the bulletin board server. Featured bulletin board system. Each of the user terminals has a unique key,
The bulletin board server includes a combination key creating unit that creates a combination key including the browsing key and a unique key of a viewing authorized person, and a combination key including the browsing key transmitted from the browsing terminal and the unique key of the browsing terminal. A combination key reproducing means for reproducing
The storage processing means stores the input text in a text storage file with the combination key attached thereto,
2. The bulletin board system according to claim 1, wherein the collating unit collates the browse key of the reproduced combination key with the browse key stored in the text storage file. The viewing condition includes at least a viewable range in the created text, the number of times of viewing, and a viewing authorized person,
The bulletin board server includes a combination key update unit that updates a browse key of the reproduced combination key after transmission of a viewable range of text to the browsing terminal, and a user terminal of the browsing authorized person using the updated browsing key. Transmission means for transmitting to
3. The bulletin board system according to claim 2, wherein the storage processing means stores the input text in a text storage file with the updated combination key attached. Each of the user terminals has a unique key distributed from the bulletin board server,
The text transmitted and received between each user terminal and the bulletin board server is encrypted using a unique key of the user terminal to be transmitted or received. Bulletin board system. A plurality of user terminals are connected via a communication line, and the text of the bulletin board created by the user terminal designated as the input terminal is stored and held, and in response to a viewing request from the user terminal designated as the viewing terminal In the bulletin board server that sends the stored bulletin board text to the viewing request source browsing terminal for browsing,
A transmission means for transmitting the viewing condition as a viewing key to a user terminal of a viewing-permitted person specified by at least a viewable range in the created text input from the input terminal and a viewing condition including a viewing-permitted person; ,
Storage processing means for storing the text input from the input terminal in a text storage file with the browse key;
Collating means for collating the browsing key included in the browsing request input from the browsing terminal and the browsing key stored in the text storage file;
A bulletin board server comprising: transmission means for reading out text in a viewable range from the text storage file based on the collation result of the collation means and transmitting the text to the browsing terminal. A plurality of user terminals are connected via a communication line, and the text of the bulletin board created by the user terminal designated as the input terminal is stored and held, and in response to a viewing request from the user terminal designated as the viewing terminal In the bulletin board browsing control method for sending and browsing the stored bulletin board text to the browsing terminal of the browsing request source,
A transmission step of transmitting the browsing condition as a browsing key to a user terminal of a permitted viewing person specified by at least a viewable range in the created text input from the input terminal and a browsing condition including a permitted viewing person; ,
A storage processing step of storing the text input from the input terminal in a text storage file with the browsing key;
A collation step for collating the browsing key included in the browsing request input from the browsing terminal with the browsing key stored in the text storage file;
A bulletin board browsing control method, comprising: a transmission step of reading out text in a browsable range from the text storage file and transmitting the text to the browsing terminal based on a matching result of the matching step.

Images